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Questions and Answers
A negatively charged rod is brought near a metal can that rests on a wooden box. You touch the opposite side of the can momentarily with your finger. If you remove your finger before removing the rod, what will happen to the can?
A negatively charged rod is brought near a metal can that rests on a wooden box. You touch the opposite side of the can momentarily with your finger. If you remove your finger before removing the rod, what will happen to the can?
- It will become negatively charged.
- It will become positively charged. (correct)
- It will remain neutral.
- It will be discharged
How does the electric field strength change as the distance from a charged object increases?
How does the electric field strength change as the distance from a charged object increases?
- The electric field strength decreases. (correct)
- The electric field strength remains constant.
- The electric field strength increases.
- The electric field strength fluctuates randomly.
Which of the following can be attracted by a positively charged object?
Which of the following can be attracted by a positively charged object?
- A neutral object (correct)
- Another positively charged object
- No other object
- Any object
Which of the following BEST explains why a charged object experiences a force in an electric field?
Which of the following BEST explains why a charged object experiences a force in an electric field?
What does Ohm's Law describe concerning electrical circuits?
What does Ohm's Law describe concerning electrical circuits?
According to Ohm's Law, if the voltage across a resistor is increased while the resistance remains constant, what happens to the current flowing through the resistor?
According to Ohm's Law, if the voltage across a resistor is increased while the resistance remains constant, what happens to the current flowing through the resistor?
Which of the following is an example of charging by conduction?
Which of the following is an example of charging by conduction?
Which of the following describes how electric charges interact with each other?
Which of the following describes how electric charges interact with each other?
Which of the following is a property of an object that has been charged by induction?
Which of the following is a property of an object that has been charged by induction?
According to Ohm's Law, if the resistance in a circuit is doubled while the voltage remains constant, what happens to the current?
According to Ohm's Law, if the resistance in a circuit is doubled while the voltage remains constant, what happens to the current?
How does the direction of an electric field relate to the direction of the force experienced by a positively charged object in that field?
How does the direction of an electric field relate to the direction of the force experienced by a positively charged object in that field?
Why do insulators not conduct electricity as well as conductors?
Why do insulators not conduct electricity as well as conductors?
What is the difference between a positive and a negative charge?
What is the difference between a positive and a negative charge?
In a circuit where Ohm's Law is applicable, if the voltage is zero, what can be said about the current flowing through the circuit?
In a circuit where Ohm's Law is applicable, if the voltage is zero, what can be said about the current flowing through the circuit?
What is the direction of the electric force between two negatively charged particles?
What is the direction of the electric force between two negatively charged particles?
What does Kirchhoff's Voltage Law (KVL) state?
What does Kirchhoff's Voltage Law (KVL) state?
How does the strength of the electric force between two charged objects change if the distance between them is doubled?
How does the strength of the electric force between two charged objects change if the distance between them is doubled?
What will happen to an uncharged conducting sphere if brought in contact with a highly positive body?
What will happen to an uncharged conducting sphere if brought in contact with a highly positive body?
A toddler slides down a plastic slide (made of polyethylene) in the playground while wearing cotton shorts. Which of the following statements is TRUE?
A toddler slides down a plastic slide (made of polyethylene) in the playground while wearing cotton shorts. Which of the following statements is TRUE?
What physical law is analogous to Coulomb's Law?
What physical law is analogous to Coulomb's Law?
What method of charging can explain a lightning strike?
What method of charging can explain a lightning strike?
If 500 J of work are required to carry a 40-C charge from one point to another, the potential difference between these two points is
If 500 J of work are required to carry a 40-C charge from one point to another, the potential difference between these two points is
The magnitude of electric potential is ______ at an infinite distance.
The magnitude of electric potential is ______ at an infinite distance.
When can you say an object or a body is electrically neutral?
When can you say an object or a body is electrically neutral?
The potential difference between two points is 100 V. If a particle with a charge of 2 C is transported from one of these points to the other, the magnitude of the work done is:
The potential difference between two points is 100 V. If a particle with a charge of 2 C is transported from one of these points to the other, the magnitude of the work done is:
The transfer of electrons from one body to another proves what law?
The transfer of electrons from one body to another proves what law?
Which of the following statements best describes Kirchhoff's Current Law?
Which of the following statements best describes Kirchhoff's Current Law?
What does Kirchhoff's Voltage Law (KVL) allow you to determine in a circuit?
What does Kirchhoff's Voltage Law (KVL) allow you to determine in a circuit?
While solving for the loop of Kirchhoff's Voltage Law, you encountered a resistor, which of the following formulas should be used?
While solving for the loop of Kirchhoff's Voltage Law, you encountered a resistor, which of the following formulas should be used?
While solving for the loop of Kirchhoff's Voltage Law, you encountered a battery, which of the following formulas should be used?
While solving for the loop of Kirchhoff's Voltage Law, you encountered a battery, which of the following formulas should be used?
Kirchhoff's Rules are particularly useful in analyzing circuits that involve:
Kirchhoff's Rules are particularly useful in analyzing circuits that involve:
In a series circuit containing three resistors, how does the total resistance of the circuit compare to the resistance of the individual resistor?
In a series circuit containing three resistors, how does the total resistance of the circuit compare to the resistance of the individual resistor?
What happens to the total resistance of a parallel circuit as more resistors are added in parallel?
What happens to the total resistance of a parallel circuit as more resistors are added in parallel?
In a parallel circuit containing three resistors, how does the total resistance of the circuit compare to the resistance of the individual resistor?
In a parallel circuit containing three resistors, how does the total resistance of the circuit compare to the resistance of the individual resistor?
If two resistors are connected in series, how does the current flowing through each resistor compare?
If two resistors are connected in series, how does the current flowing through each resistor compare?
Which of the following statements about resistors in PARALLEL connection is FALSE?
Which of the following statements about resistors in PARALLEL connection is FALSE?
What is the purpose of a surge protector in electrical systems?
What is the purpose of a surge protector in electrical systems?
What is the equivalent resistance of two resistors, each having 4 Ω, and connected in a parallel connection?
What is the equivalent resistance of two resistors, each having 4 Ω, and connected in a parallel connection?
What is the equivalent resistance of two resistors, each having 4 Ω, and connected in series?
What is the equivalent resistance of two resistors, each having 4 Ω, and connected in series?
When charging by conduction, when the charged rod is positive, what happens to the charge of the neutral object?
When charging by conduction, when the charged rod is positive, what happens to the charge of the neutral object?
What is charging by friction?
What is charging by friction?
If three resistors of different values are connected in parallel, how does the voltage drop across each resistor compare?
If three resistors of different values are connected in parallel, how does the voltage drop across each resistor compare?
In a parallel circuit with two identical resistors, if one resistor is replaced with a resistor of higher resistance, what happens to the total resistance of the circuit?
In a parallel circuit with two identical resistors, if one resistor is replaced with a resistor of higher resistance, what happens to the total resistance of the circuit?
Which of the following is NOT a recommended practice for electrical safety?
Which of the following is NOT a recommended practice for electrical safety?
What is the potential difference between two points in a circuit if 10 Joules of energy are used to move 2 Coulombs of charge between the two points?
What is the potential difference between two points in a circuit if 10 Joules of energy are used to move 2 Coulombs of charge between the two points?
Flashcards
Why do charged objects experience force in an electric field?
Why do charged objects experience force in an electric field?
The electric field exerts a force on charged objects in its vicinity.
What does Ohm's Law describe?
What does Ohm's Law describe?
Ohm's Law describes the relationship between voltage, current, and resistance in an electrical circuit.
How do like charges interact?
How do like charges interact?
Like charges repel.
What is a property of an object charged by induction?
What is a property of an object charged by induction?
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What happens to current if resistance doubles?
What happens to current if resistance doubles?
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How does the electric field relate to force on a positive charge?
How does the electric field relate to force on a positive charge?
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Why are insulators poor conductors?
Why are insulators poor conductors?
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What is the difference between positive and negative charge?
What is the difference between positive and negative charge?
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What does Kirchhoff's Voltage Law state?
What does Kirchhoff's Voltage Law state?
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Which physical law is analogous to Coulomb's Law?
Which physical law is analogous to Coulomb's Law?
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What method of charging explains a lightning strike?
What method of charging explains a lightning strike?
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What does Kirchhoff's Current Law state?
What does Kirchhoff's Current Law state?
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Total resistance in series?
Total resistance in series?
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Voltage drop in parallel resistors
Voltage drop in parallel resistors
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Equivalent resistance in series.
Equivalent resistance in series.
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Study Notes
- If a negatively charged rod is brought near a metal can, rested on a wooden box, touching the opposite side momentarily before removing the rod causes the can to become positively charged.
- Electric field strength decreases as the distance from a charged object increases.
- A positively charged object attracts neutral objects.
- The electric field exerts a force on any charged object in its vicinity, explaining why a charged object experiences a force in an electric field.
- Ohm's Law describes the relationship between voltage and current in a circuit.
- According to Ohm's Law, if voltage increases across a resistor while resistance remains constant, the current increases.
- Charging a metal sphere by bringing a charged rod into contact with it exemplifies charging by conduction.
- Like charges repel and opposite charges attract, describing how electric charges interact.
- An object charged by induction has a net charge of zero.
- According to Ohm's Law, if resistance doubles in a circuit while voltage remains constant, the current halves.
- The direction of an electric field and the force experienced by a positively charged object in that field are the same.
- Insulators have fewer free electrons than conductors, which is why they do not conduct electricity as well.
- A positive charge has more protons than electrons, while a negative charge has more electrons than protons.
- If the voltage is zero in a circuit where Ohm's Law applies, the current is also zero.
- The electric force between two negatively charged particles directs them away from each other.
- Kirchhoff's Voltage Law (KVL) states that the algebraic sum of voltage drop and voltage rise around a closed loop in a circuit is equal to zero.
- If the distance between two charged objects doubles, the strength of the electric force between them decreases by a factor of 4.
- An uncharged conducting sphere becomes positively charged when brought in contact with a highly positive body.
- When a toddler slides down a plastic slide in cotton shorts, the toddler loses electrons while the slide gains electrons, resulting in a negative charge on the toddler and slide.
- Coulomb's Law is analogous to the Law of Universal Gravitation.
- A lightning strike can be explained by the method of charging by conduction.
- If 500 J of work are required to carry a 40-C charge, the potential difference between the two points is 12.5 V.
- If a particle with a charge of 2 C is transported between two points with a potential difference of 100 V, the magnitude of the work done is 200 J.
- An object is electrically neutral when electrons and protons have the same amount inside the body.
- The magnitude of electric potential is zero at an infinite distance.
- The transfer of electrons from one body to another proves the Law of Conservation of Charges.
- Kirchhoff's Current Law is best described as the total current entering a junction being equal to the total current leaving the junction.
- Kirchhoff's Voltage Law (KVL) allows the determination of the voltage rise/drop across each resistor in a loop.
- When solving for the loop of Kirchhoff's Voltage Law and encountering a resistor, use the value of the Current multiplied by the Resistance of the resistor.
- When solving for the loop of Kirchhoff's Voltage Law and encountering a battery, no formula is needed; use the given Voltage.
- Kirchhoff's Rules are particularly useful in analyzing circuits that involve both series and parallel connections.
- In a series circuit, the total resistance is equal to the sum of the resistances of the individual resistors.
- Total resistance decreases as more resistors are added in parallel.
- In a parallel circuit containing three resistors, the total resistance is less than the sum of the resistances of the individual resistors.
- If two resistors are connected in series, the current is equal in both resistors.
- A false statement about resistors in a parallel connection is that the equivalent resistance is greater than the individual resistance.
- A surge protector in electrical systems functions to suppress voltage spikes and surges.
- The equivalent resistance of two 4 Ω resistors connected in parallel is 2 Ω.
- The equivalent resistance of two 4 Ω resistors connected in series is 8 Ω.
- When charging by conduction with a positive charged rod, the neutral object becomes positively charged.
- Charging by friction involves charging a neutral object by rubbing it with another object.
- When charging by induction with a positive charged rod, the neutral object becomes negatively charged.
- Charging by conduction involves bringing a neutral object into contact with a charged object.
- Charging by induction involves bringing a charged object close to a neutral object.
- When three resistors of different values are connected in parallel, the voltage drop is equal across all resistors.
- In a parallel circuit with two identical resistors, replacing one with a higher resistance resistor causes the total resistance to increase.
- Handling electrical appliances with wet hands is not a recommended practice for electrical safety.
- The potential difference between two points with 10 Joules and 2 Coulombs is 5 V.
- Overloading an extension cord with multiple devices is not a safe practice.
- The equivalent resistance of two resistors (5.0 Ω and 10.0 Ω) in a series circuit is 15.0 Ω.
- The equivalent resistance of two resistors (5.0 Ω and 10 Ω) in a parallel circuit is 3.33 Ω.
- If the potential difference of two capacitors is equal to 10 V in a parallel connection, the voltage of one of the capacitors is 10.0 V.
- If the charge of the 1st resistor in a series connection is 10 nC, the charge of the 2nd resistor is 10.0 nC.
- In a circuit with three independent loops, three independent Kirchhoff's Voltage Law equations are needed to analyze the circuit.
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