Phy Unit 5

Question 1

Which converts electrical energy into mechanical energy

Answer 1

Motor

Question 2

Which converts mechanical energy into electrical energy

Answer 2

Generator

Question 3

Transformer works on

Answer 3

AC only

Question 4

Part of AC generator that passes current from armature coil to external circuit

Answer 4

Split rings

Question 5

Unit of magnetic flux density

Answer 5

Weber/meter²

Question 6

SI unit of magnetic field induction

Answer 6

Tesla

Question 7

Device used to convert high alternating current to low alternating current

Answer 7

Transformer

Question 8

Transformer converts

Answer 8

High alternating current to low alternating current

Question 9

Electric motor converts

Answer 9

Electrical energy into mechanical energy

Question 10

Generator converts

Answer 10

Mechanical energy into electrical energy

Question 11

Device which produces electric current

Answer 11

Generator

Question 12

Electromagnetic induction (match the following)

Answer 12

Oersted

Question 13

Electric generator ( match the following)

Answer 13

Faraday

Question 14

Fleming’s left hand rule is also known as

Answer 14

Motor rule

Question 15

Main parts of electric motor

Answer 15

Carbon brush
Commutator
Permanent magnet
Coil

Question 16

Voltage of AC can be very easily using a device called

Answer 16

Transformer

Question 17

AC can be carried over long distances using

Answer 17

Step up Transformers