Question 1

Which component is essential for generating the magnetic field in an electric motor?

Accepted Answer

Electromagnet

Answer

Resistor

Answer

Capacitor

Answer

Transistor

Question 2

What happens when you increase the electric current in an electromagnet?

Accepted Answer

The magnetic field strength increases

Answer

The magnet becomes weaker

Answer

The electromagnet turns off

Answer

The wire melts

Question 3

How does the number of coils affect the strength of an electromagnet?

Accepted Answer

More coils increase the strength

Answer

The number of coils has no effect

Answer

More coils decrease the strength

Answer

Only one coil is needed

Question 4

In what way can an electromagnet be made stronger besides adding more coils?

Accepted Answer

Increasing the electric current

Answer

Using thicker wire

Answer

Making it out of plastic

Answer

Decreasing the coil length

Question 5

What is the main advantage of using an electromagnet over a permanent magnet?

Accepted Answer

It can be turned on and off

Answer

It is lighter

Answer

It has a fixed shape

Answer

It is always stronger

Question 6

What type of electricity is typically used to power electromagnets in most applications?

Accepted Answer

Alternating current (AC)

Answer

Direct current (DC)

Answer

Static electricity

Answer

Solar power

Question 7

What is the primary material used to enhance the magnetic field in an electromagnet?

Accepted Answer

Iron

Answer

Copper

Answer

Plastic

Answer

Aluminum

Question 8

What type of energy does a generator produce?

Accepted Answer

Electrical energy

Answer

Mechanical energy

Answer

Thermal energy

Answer

Chemical energy

Question 9

What is the purpose of a generator?

Accepted Answer

To convert mechanical energy into electrical energy

Answer

To increase electrical voltage

Answer

To cool electrical circuits

Answer

To store electrical energy

Question 10

In a generator, what happens when the coil rotates within a magnetic field?

Accepted Answer

Electricity is generated

Answer

Heat is produced

Answer

Sound is created

Answer

Light is emitted

Question 11

What type of transformer is used to increase voltage?

Accepted Answer

Step-up transformer

Answer

Isolation transformer

Answer

Auto transformer

Answer

Step-down transformer

Question 12

What is the main purpose of a transformer in electrical systems?

Accepted Answer

To change the voltage level

Answer

To convert AC to DC

Answer

To increase current

Answer

To store energy

Question 13

What happens to the current when the voltage is stepped up in a transformer?

Accepted Answer

The current decreases

Answer

The current becomes zero

Answer

The current stays the same

Answer

The current increases

Question 14

What physical principle does a transformer operate on?

Accepted Answer

Electromagnetic induction

Answer

Thermal conduction

Answer

Magnetic repulsion

Answer

Electrolysis

Question 15

What is the function of the primary winding in a transformer?

Accepted Answer

To receive the input voltage

Answer

To convert AC to DC

Answer

To transmit output current

Answer

To generate magnetic fields

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