3.4 Transformers

The transformer is a device used to .......... the value of a voltage.

• steady

• resist

• change

• anchor

If a transformer reduces voltage, it is called a....................... transformer.

• step left

• step right

• step up

• step down

Tags

NGSS.HS-PS3-3

If a transformer increases voltage, it is called a ......... transformer.

• step right

• step left

• step up

• step down

The winding of a transformer which is connected to a source of energy is called the ....... winding.

• primary

• secondary

• tertiary

A Transformer is an example of a ........................... inductance

• mechanical

• electromagnetic

• transformer

The thin sheets of steel from which transformer cores are made are called...................

• lamination

• transformer

• copper

A laminated transformer core reduces the amount of energy that is wasted in the form of........

• solidifying

• flux

• heat

Tags

NGSS.HS-PS3-4

A transformer cannot deliver more..................to a load from its secondary winding than is supplied to the primary winding.

• electrololysis

• magnetism

• energy

A transformer connected to 240 V a.c. and produced 12 V at secondary coil,If the turns of primary coil 2000, calculate the number of turns of the secondary coil?

• 100

• 200

• 300

• 400

A bulb 12 V, 24 W is connected to output terminal, what is the current in secondary circuit?

• 2.0 A

• 4.0A

• 6.0A