Electricity and Magnetism Quiz

What is the unit of electric current?

• Volt

• Ampere

• Ohm

• Watt

What is the unit of magnetic flux?

• Tesla

• Weber

• Henry

• Farad

What is the unit of magnetic field strength?

• Tesla

• Weber

• Henry

• Farad

What is the unit of resistivity?

• Ohm-meter

• Ohm

• Siemens

• Volt

Which material has the highest resistivity?

• Copper

• Silver

• Rubber

• Gold

Which of the following materials is a good conductor of electricity?

• Glass

• Wood

• Copper

• Rubber

What happens to the resistance of a conductor as its temperature increases?

• Increases

• Decreases

• Remains the same

• Becomes zero

What is the relationship between resistance ®, resistivity (ρ), length (L), and cross-sectional area (A) of a conductor?

• ( R = \frac{\rho L}{A} )

• ( R = \frac{A}{\rho L} )

• ( R = \frac{\rho A}{L} )

• ( R = \frac{L}{\rho A} )

Which component is used to store electrical energy?

• Resistor

• Capacitor

• Inductor

• Diode

Which component is used to control the flow of current in a circuit?

• Resistor

• Capacitor

• Inductor

• Transformer