30 Questions
What is the measure of how easily electricity flows through a material?
Electrical conductivity
What happens to the conductivity of metals when the temperature increases?
It decreases
What is the standard metric unit for resistance?
Ohm
What slows down the movement of electrons through a material?
Collisions
What is the result of an increase in the number of collisions between free electrons in a conductor?
An increase in resistance
What is the movement of electrons through a material?
Electricity
What is the rate at which electric charge flows past a point on a circuit?
Current
What is the standard metric unit for current?
Ampere
What is the direction of electron flow in a circuit?
Out of the negative terminal, through the circuit and into the positive terminal
What is a property of materials that determines how easily electricity flows through them?
Conductivity
What is the relationship between the quantity of charge and time in determining current?
Current is the ratio of charge and time
What is a characteristic of materials with high conductivity?
Electricity flows easily
What is the characteristic of current in a series circuit?
The same current in each resistor
How are the resistor leads connected in a parallel circuit?
All leads on one side of the resistors are connected together
What is used to calculate the equivalent resistance for resistors?
Ohm's Law
What is the graphical representation of an electrical circuit called?
All of the above
What is the formula for calculating the equivalent resistance for resistors connected in series?
R_total = R1 + R2 +...
What is the purpose of a circuit diagram?
To simplify an electrical circuit
What is the primary function of resistors in a circuit?
To limit or regulate the flow of electric current
How are resistors commonly represented in a circuit diagram?
By a zigzag line
How do resistors affect the flow of electric current in a circuit?
They slow down the flow of electric current
What determines the equivalent resistance of a combination of resistors?
Both the individual values and the way they are connected
What is a common characteristic of most circuits?
They have more than one resistor
What is the purpose of using resistors in a circuit?
To create a precise quantity of resistance in a circuit
What is the main purpose of a circuit diagram?
To illustrate the relative positions of components and their relationships
What is the primary function of an ammeter?
To measure a small amount of current
How is a voltmeter connected to an electric circuit?
In parallel with the circuit
What is the connection polarity of an ammeter and a voltmeter?
Negative to negative, positive to positive
What is a common use of circuit diagrams?
To design and construct electrical equipment
What do circuit diagrams typically consist of?
Images of distinct components or standard symbols
Understand the concept of electric current, its measurement, and units. Learn how to calculate current as the ratio of charge and time. Test your knowledge of electric currents in physics!
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
