Electric Current and Ohm's Law Quiz

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What is the formula for resistance in terms of resistivity, length, and cross-sectional area?

R = ρl/A (correct)

R = ρlA

R = ρl

R = ρ/A

Which formula is used to calculate the electrical energy consumed over a period of time?

E = V/R

E = IRt

E = VIt (correct)

E = I2Rt

What is the unit of electric power consumed in a circuit?

Amps

Volts

Joules

Watts (correct)

In the context of a circuit, what does the term 'back emf' refer to?

The emf that acts against the main emf Signup and view all the answers

What is the formula for calculating current in a circuit with an internal resistance?

I = ε/(R + r) Signup and view all the answers

In a series combination of n cells with unequal emf, what is the total emf equivalent to?

(ε + nr) Signup and view all the answers

Which law relates the magnetic field around a current-carrying wire?

Biot-Savart Law Signup and view all the answers

What does the dielectric constant measure in a material?

Ability to store electric charge Signup and view all the answers

How is capacitance defined in terms of charge and potential difference?

$C = Q/V$ Signup and view all the answers

What is the relationship between conductors and insulators in terms of electron mobility?

Conductors have higher electron mobility than insulators. Signup and view all the answers

Electric Current and Ohm's Law Quiz

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Questions and Answers

What is the formula for resistance in terms of resistivity, length, and cross-sectional area?

Which formula is used to calculate the electrical energy consumed over a period of time?

What is the unit of electric power consumed in a circuit?

In the context of a circuit, what does the term 'back emf' refer to?

What is the formula for calculating current in a circuit with an internal resistance?

In a series combination of n cells with unequal emf, what is the total emf equivalent to?

Which law relates the magnetic field around a current-carrying wire?

What does the dielectric constant measure in a material?

How is capacitance defined in terms of charge and potential difference?

What is the relationship between conductors and insulators in terms of electron mobility?

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