TRANSFORMERS

Which of the following describes an AC motor?

• Powered by direct current

• Has only one basic part

• Operates by applying alternating current

• Requires no magnetic field

A transformer actually transforms

• voltage

• magnetic field lines

• generators into motors

A transformer actually transforms

• voltage

• magnetic field lines

• generators into motors

What type of current is produced in a battery

• induced

• magnetic

• alternating

• direct

Which of the following describes an AC motor?

• Powered by direct current

• Has only one basic part

• Operates by applying alternating current

• Requires no magnetic field

Which of the following is a part of a transformer?

• Battery

• Iron core

• Resistor

• Capacitor

In a step-down transformer, the number of turns in the secondary coil is:

• More than the primary coil

• Equal to the primary coil

• Less than the primary coil

• Not important

Which of the following appliances uses a step-down transformer?

• Mobile phone charger

• Power station

• Electric train

• Satellite dish

The core of a transformer is made of iron to:

• Store electricity

• Increase resistance

• Strengthen the magnetic field

• Insulate the coils

What type of current does a transformer work with?

• Direct Current (DC)

• Alternating Current (AC)

• Both AC and DC

• Static electricity