Electricity and Magnetism Mastery Quiz

What is the unit of electric current?

• Volt

• Ampere

• Ohm

• Watt

In a series circuit with three resistors, if one resistor is removed, what happens to the total current?

• It increases

• It decreases

• It remains the same

• It becomes zero

What is the direction of the magnetic field around a straight conductor carrying current?

• Parallel to the conductor

• Perpendicular to the conductor

• In the direction of the current

• Circular around the conductor

Which law states that the induced electromotive force in any closed circuit is equal to the rate of change of the magnetic flux through the circuit?

• Ohm's Law

• Coulomb's Law

• Faraday's Law of Electromagnetic Induction

• Gauss's Law

What is the speed of electromagnetic waves in a vacuum?

What is the potential difference between two points in an electric field called?

• Electric current

• Electric resistance

• Electric potential

• Electric power

Which of the following is NOT a method of producing a magnetic field?

• Moving electric charges

• Changing electric fields

• Permanent magnets

• Insulating materials

What is the SI unit of magnetic flux?

• Tesla

• Weber

• Ampere-turn

• Henry

What does Kirchhoff's Voltage Law state?

• The sum of all currents entering a junction equals the sum leaving it.

• The sum of the electrical potential differences (voltage) around any closed network is zero.

• The total resistance in a series circuit is equal to the sum of the individual resistances.

• The voltage across a resistor is directly proportional to the current flowing through it.

What is the principle behind the operation of a transformer?

• Electromagnetic induction

• Electrostatic discharge

• Direct current conversion

• Magnetic resonance