Electricity and Magnetism Quiz

What is the SI unit of electric current?

• Volt

• Ampere

• Ohm

• Watt

Which quantity is defined as the work done to move one coulomb of charge?

• Current

• Resistance

• Potential Difference

• Power

If a current of 2 A flows for 5 seconds, how much charge is transferred?

• 2 C

• 5 C

• 10 C

• 0.4 C

What is the formula for Ohm's Law?

• V = IR

• P = IV

• Q = It

• R = V/I

Which of the following is an ohmic conductor?

• Diode

• Filament bulb

• Copper wire

• Thermistor

Resistance increases when:

• Length of wire decreases

• Cross-sectional area increases

• Temperature decreases

• Length of wire increases

What does e.m.f. represent in a circuit?

• Voltage drop

• Energy per unit charge

• Resistance

• Power

Internal resistance causes:

• Increase in current

• Increase in e.m.f.

• Voltage drop across terminals

• Decrease in resistance

Which component has internal resistance?

• Resistor

• Battery

• Switch

• Ammeter

In a series circuit, the current is:

• Different at each point

• Zero

• Same throughout

• Depends on voltage