Question

Ceiling fan is a …………………… fan mounted on a ceiling of a room and powered by electricity *

Mechanical

Physical

Natural

All of above

Ceiling fans usually have …………… blades. *



3 or 4

7 or 8

4 or 8

3 or 7

Earliest form of ceiling fans were invented in India around …………….. *



1986

1947

500 BC

None of these

Name the earlier form of fan shown in picture,*





Natural fan

Punkah

Leafs

None of above

……………………. is a part of a ceiling fan. *



Capacitor

Electric motor

Blades

All of these

Ceiling fan works in ………………. current. *


Direct

Alternating

Both (a) and (b)

None of above

………………… are the copper coils that are wrapped around steel bars or laminations. *


Windows

Conductors

Windings

Housing

In a motor, …………………..is the stationary part that does not move. *



Rotor

Stator

Stand

Winding

In a motor, ………………….. is the part that moves and rotates. *



Rotor

Stator

Stand

Winding

Working principle of an electric motor is ……………………... *


Electromechanic induction

Electromagnetic induction

Electrochemical induction

Electromagnetic conduction

In a motor …………….. is the outer covering that encloses the rotor *



Housing

Stator

Stand

Winding

Sound is created by ………………………... *



Strings

Vibrations

Speakers

None of these

In a speaker …………………. energy is converted to sound energy. *


Chemical

Mechanical

Electrical

Any of above

Sounds travels through ………………… *



Air

Water

Vacuum

Both (a) and (b)

……………….. travels in the form of compressions and rarefactions. *



Sound waves

Light waves

Electric waves

All of above

…………….. helps us to convert sound energy into electrical energy. *


Speakers

Tuning fork

Micro phone

None of above

.......................... is an electrical component which connects or disconnects conducting path in a circuit. *



capacitor

resistor

battery

switch

............................... is a device used to store energy

capacitor

resistor

battery

switch

..................................... type of switch is available in Tinkercad. *



push button

slideswitch

both (a) and (b)

none of above

..................................... is a type of capacitor. *

polarised

non polarised

both (a) and (b)

none of above



​

Answer 1

Answer:

1. mechanical

2. 3 or 4

3. 1986

4. figure is not given

5. all of these

6. both a and b

7. conductor

8. rotor

9. electromagnetic conduction

10. stator

11 vibration

12. electrical

13. air and water

14 sounds wave

15. microphone

16 switch

17. slideswitch

18. polarized

Answer 2

Answer:
A} Mechanical fan
B} 3 to 4