What is the SI unit of electric current?

• Ohm

• Coulomb

• Volt

• Ampere

What does a primary cell do?

• Used only once

• Has a chemical reaction

• Provides constant voltage

• Can be recharged

What is the formula for calculating power in terms of voltage and current?

• P = V/I

• P = IR

• P = VI

• P = R/I

What happens to the total voltage in a series circuit?

• It is zero

• It is divided equally

• It is the sum of individual voltages

• It remains constant

What is the effect of increasing the temperature of a conductor on its resistance?

• Decreases resistance

• Increases resistance

• No effect

• Depends on the material

What is the equivalent resistance of two resistors in series?

• R1 + R2

• R1 * R2

• R1 - R2

• R1 / R2

What is the main advantage of connecting batteries in parallel?

• Redundancy if one fails

• Easier to recharge

• Lower current draw

• Higher voltage

What is the relationship between voltage, current, and resistance called?

• Ampere's Law

• Ohm's Law

• Faraday's Law

• Kirchhoff's Law

What is the purpose of a fuse in an electrical circuit?

• Increase current

• Protect against overload

• Regulate voltage

• Store energy

What is the formula for calculating the total current in a parallel circuit?

• I = R/V

• I = P/V

• I = V/R

• I = I1 + I2 + I3