Electricity Generation and Transmission Quiz

What are the two main devices involved in getting electrical power to your home?

• Electric generators and transformers

• Batteries and capacitors

• Resistors and inductors

• Solar panels and wind turbines

How do electric generators produce electricity?

• By using solar energy

• By storing electrical energy

• By converting mechanical energy into electrical energy

• By converting electrical energy into mechanical energy

What type of current is produced by most generators used in power plants?

• Direct current (DC)

• Static current

• Alternating current (AC)

• Pulsating current

What is the frequency of AC power in most places in the world?

• 10-20 times per second

• 70-80 times per second

• 30-40 times per second

• 50-60 times per second

Which factor does NOT affect the emf induced in a generator coil?

• Color of the coil

• Area of a loop of the coil

• Strength of the magnetic field

• Number of loops in the coil

Why is it beneficial to transmit electricity at high voltages?

• It reduces power loss as heat

• It increases power loss as heat

• It makes the electricity safer

• It reduces the speed of electricity

What is the role of a step-up transformer?

• To decrease the voltage

• To store electrical energy

• To increase the voltage

• To convert AC to DC

How does a wireless charger work?

• By using solar energy

• By converting AC to DC

• By using mutual inductance

• By using a physical connection