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Transformer

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

A Transformer is used to change _________in a circuit

a)

Voltage

b)

frequency

c)

power

d)

inductance

2.

True or False.. In an electrical transformer, High Voltage side will have more number of turns:

a)

True

b)

False

3.

Transformer works on which of the following principle:

a)

Fleming's Law

b)

Faraday's Law of Electromagnetic induction

c)

Ampere's Law

d)

Lenz Law

4.

Which of the following represent the ratings on a transformer

a)

KVA and A

b)

KW and V

c)

V and R

d)

W and I

5.

True or False.... Transformer Oil acts as Coolant but not as Insulating Medium

a)

True

b)

False

6.

True or false...Electrical Transformer can able to Transform both AC and DC Voltages in a Circuit:

a)

True

b)

False

7.

What type of transformer is this?

a)

Step up

b)

Step down

8.

Lamination of the transformer core is made of _____________

a)

Iron

b)

Silicon Steel

c)

Aluminum

d)

Cast Steel

9.

A transformer transform

a)

Current

b)

Voltage & current

c)

Frequency

d)

Voltage

10.

Primary winding of a transformer

a)

is always a low voltage winding

b)

is always a high voltage winding

c)

Could either be a low voltage or high voltage winding

d)

none of the above

11.

In a step down transformer the current in the secondary changes by 15 A ,this results in a change in the supply current of __________.

a)

less than 15 A

b)

more than 15 A

c)

15 A

d)

none of the above

12.

Which side of a step up transformer will have a larger size conductor?

a)

primary

b)

secondary

c)

top

d)

bottom

13.

In a transformer energy is transfer from the primary to the secondary through____________.

a)

Cooling oil

b)

through air

c)

by the flux

d)

none of the above

14.

A transformer has a current ratio of 3:5 ,which side of the transformer has less current flowing ?

a)

primary

b)

secondary

c)

right side

d)

top

15.

The turns ratio of a transformer is equal to ____________

a)

Vs/ Vp

b)

Ip/Is

c)

Pp/Ps

d)

Vp /Vs