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Questions and Answers
What describes the electric field in a vacuum?
What describes the electric field in a vacuum?
What is the relationship between electric induction and electric intensity?
What is the relationship between electric induction and electric intensity?
What is the total electric charge of n capacitors in series, each with a capacity of C?
What is the total electric charge of n capacitors in series, each with a capacity of C?
What is the voltage difference at the terminals of n capacitors in series?
What is the voltage difference at the terminals of n capacitors in series?
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In which order do the following materials have increasing electrical conductivity?
In which order do the following materials have increasing electrical conductivity?
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What is the unit of measurement for magnetic induction?
What is the unit of measurement for magnetic induction?
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What is the equivalent capacitance of two capacitors, each with a capacitance of C, connected in series?
What is the equivalent capacitance of two capacitors, each with a capacitance of C, connected in series?
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What is the self-inductance of a coil carrying a current of intensity i?
What is the self-inductance of a coil carrying a current of intensity i?
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Why don't we get electrocuted when we touch a conductor?
Why don't we get electrocuted when we touch a conductor?
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What type of force exists between two parallel conductors in a vacuum?
What type of force exists between two parallel conductors in a vacuum?
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What happens when a bar is moved in a constant magnetic field?
What happens when a bar is moved in a constant magnetic field?
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What happens when a conductor is electrified by electrostatic influence?
What happens when a conductor is electrified by electrostatic influence?
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What happens when two-current carrying conductors are perpendicular to each other in a plane?
What happens when two-current carrying conductors are perpendicular to each other in a plane?
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What does it mean when a dielectric is electrically polarized?
What does it mean when a dielectric is electrically polarized?
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What is the magnetic field in a vacuum described by?
What is the magnetic field in a vacuum described by?
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Which of the following relations is true?
Which of the following relations is true?
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What is the equivalent resistance of n resistors connected in parallel?
What is the equivalent resistance of n resistors connected in parallel?
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What does it mean when a dielectric is electrically polarized?
What does it mean when a dielectric is electrically polarized?
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Which of the following relations is true?
Which of the following relations is true?
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What is the unit of measurement for?
What is the unit of measurement for?
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What do I1 and I2 represent?
What do I1 and I2 represent?
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What does the self-inductance of a coil depend on?
What does the self-inductance of a coil depend on?
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What is the direction of the force acting on a conductor?
What is the direction of the force acting on a conductor?
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What can deflect a beam of electrons?
What can deflect a beam of electrons?
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What happens to the local charge on the earth when a cloud with positive electric charges approaches?
What happens to the local charge on the earth when a cloud with positive electric charges approaches?
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How does the electrodynamic force between two parallel conductors depend on the distance r between them?
How does the electrodynamic force between two parallel conductors depend on the distance r between them?
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How does the capacitance of a capacitor depend on the relative permittivity?
How does the capacitance of a capacitor depend on the relative permittivity?
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How is electric charge distributed in a massive conductor?
How is electric charge distributed in a massive conductor?
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What is the direction of the force on a charge in a magnetic field?
What is the direction of the force on a charge in a magnetic field?
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What is the condition for electrostatic induction to occur?
What is the condition for electrostatic induction to occur?
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Why is the phenomenon of electrocution in an electrostatic field rare?
Why is the phenomenon of electrocution in an electrostatic field rare?
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When you touch the dome of a Van de Graff generator and stand on a plastic chair, why does your hair stand up?
When you touch the dome of a Van de Graff generator and stand on a plastic chair, why does your hair stand up?
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If a positively charged body is connected to the ground, what happens to the surplus charge?
If a positively charged body is connected to the ground, what happens to the surplus charge?
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What is the distribution of electric charge inside a charged conductor?
What is the distribution of electric charge inside a charged conductor?
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What does Ohm's Law relate?
What does Ohm's Law relate?
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What is the equivalent of capacitance in electrostatics for inductance in electromagnetism?
What is the equivalent of capacitance in electrostatics for inductance in electromagnetism?
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In order of increasing frequency, which sequence is correct?
In order of increasing frequency, which sequence is correct?
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What is the primary equation of material in an electrostatic field?
What is the primary equation of material in an electrostatic field?
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Study Notes
Electric Field and Magnetism
- The electric field in a vacuum is described by the electric field intensity and the electric induction.
- The electric field intensity is a vector field that is proportional to the force experienced by a test charge at a given point in space.
- The electric induction, also known as the electric flux density, is a measure of the electric field intensity at a given point in space.
Capacitance and Electric Charge
- The capacitance of a capacitor is the ratio of the electric charge stored on the capacitor to the voltage across it.
- The capacitance of a capacitor depends on the permitivity of the material, the distance between the plates, and the area of the plates.
- When a capacitor is connected in series, the equivalent capacitance is less than the capacitance of each individual capacitor.
Magnetic Field and Inductance
- The magnetic field is a vector field that describes the magnetic force experienced by a moving charge or a current-carrying wire.
- The magnetic flux is a measure of the magnetic field that passes through a given area.
- The inductance of a coil is the ratio of the magnetic flux through the coil to the current flowing through it.
Electromagnetic Induction and Faraday's Law
- Electromagnetic induction is the process by which a changing magnetic flux induces an electromotive force (EMF) in a conductor.
- Faraday's law of induction states that the EMF induced in a conductor is proportional to the rate of change of the magnetic flux through the conductor.
Electric Current and Resistance
- Electric current is the flow of electric charge, typically measured in amperes (A).
- Resistance is the opposition to the flow of electric current, measured in ohms (Ω).
- Ohm's law states that the voltage (V) across a conductor is proportional to the current (I) flowing through it, with the proportionality constant being the resistance (R).
Electromagnetic Waves and Frequency
- Electromagnetic waves are waves of electric and magnetic fields that propagate through space.
- The frequency of an electromagnetic wave is the number of oscillations per second, measured in hertz (Hz).
- The order of increasing frequency is: radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
Miscellaneous
- When a dielectric material is polarized, the electric dipoles align, resulting in a net electric field.
- The force between two parallel conductors carrying current is inversely proportional to the distance between them.
- A conductor in a magnetic field will experience a force, the direction of which depends on the direction of the magnetic field and the sense of the current flow.
- When a conductor is charged and earthed, the surplus charge flows to earth, neutralizing the conductor.
- The Hall effect is the production of a voltage across a conductor perpendicular to the direction of the current flow and the magnetic field.
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Description
Test your knowledge of electric fields, induction, and electromagnetism with these 140 questions designed to prepare you for the TCE exam. Questions cover topics such as electric field intensity, electric induction, and magnetic induction.
