MOTOR

Which of the following amounts of voltage will produce the weakest magnetic field in the electromagnet?

• A. 1 A

• B. 1.5 A

• C. 2 A

• D. 2.5 A

Which of the following will produce the strongest electromagnet?

• A coil of 20 turns of wire

• A coil of 20 turns of wire

• A coil of 30 turns of wire

• A coil of 40 turns of wire

Which of the following describes a motor?

• It creates mechanical energy.

• It doesn't need an electrical source to function.

• It doesn't follow the Law of Conservation of Energy.

• It converts electrical energy into mechanical energy.

Which of the following converts electrical energy into mechanical energy ?

• circuit breaker

• generator

• transformer

• washing machine

Which of the following cannot affect the performance of a motor?

• battery

• magnetic force

• number of turns in the coil

• size of the voltmeter

Electromagnet doesn't need an electric source to produce a magnetic field.

• True

• False

Motors create mechanical energy.

• True

• False

Electromagnet is a permanent magnet

• True

• False

The stronger the electromagnet, the motor will spin faster.

• True

• False

Which of the following parts of the motor cannot be found in generators?

• commutator

• dry cell

• armature

• permanent magnet