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Questions and Answers
What is the formula for resistance in terms of resistivity, length, and cross-sectional area?
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?
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?
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?
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?
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?
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?
Which law relates the magnetic field around a current-carrying wire?
What does the dielectric constant measure in a material?
What does the dielectric constant measure in a material?
How is capacitance defined in terms of charge and potential difference?
How is capacitance defined in terms of charge and potential difference?
What is the relationship between conductors and insulators in terms of electron mobility?
What is the relationship between conductors and insulators in terms of electron mobility?
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