Electricity and Magnetism

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Physics – After SEE – LS

Dear ! This is Electricity and Magnetism Quiz and it contains 30 questions.

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1. Electromotive force of dry cell is

1.5 V

2 V

1 V

2.5 V

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2. The unit of potential difference is

Ampere

Volt

Watt

all of these

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3. 1 ampere is equal to

25.6×10⁻¹⁸ e/sec

6.25×10¹⁸ e/sec

6.25×10 ⁻¹⁸e/sec

6.67×10¹⁸ e/sec

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4. Which of the following relation shows the ohm’s law ? ρ

ρ=Rl/A

P=Vi

V=iR

All of these

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5. EMF of lead acid cell is

1.5 V

3.5 V

2.5 V

1 V

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6. Fore finger by Fleming,s right hand rule indicates

Direction of motion

Direction of induced current

Direction of magnetic field

Direction of rest

7 / 30

7. Fuse has

High resistivity, high melting point

High resistivity ,low melting point

Low resistivity, low melting point

Low resistivity, high melting point

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8. Transformer works

On only A.C.

On only D.C

Both on A.C & D.C.

None

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9. If ρ be conductivity , R be resistance ,A be area and L be the length then the relation be

ρ= RA/L

P=iR

R=ρA/L

A= ρR/

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10. IF 10 Ω resistance is connected to 200 v of p.d. in a circuit then find its power of circuit .

2 kilowatt

4 kilowatt

8 kilowatt

12 kilowatt

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11. The angle between magnetic axis and the geographical axis of the earth is

0⁰

17⁰

42⁰

90⁰

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12. Generator is based on principle of

Coulomb's law

Newton's law

Electromagnetic induction

Conservation of energy

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13. The value of 1 unit electricity is

3.36×10⁵ j

3.66×10⁶ j

3.36×10⁶ j

3.6×10⁶ j

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14. Nichrome wire is made up of

Cu+Ni

Cr+Ni

Sn+pd

Cu+Zn

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15. D.C. motor converts

Mechanical energy –>electrical energy

Electrical energy –> mechanical energy

Mechanical energy –> heat energy

Sound energy –> electrical energy

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16. Percentage of nickel in nichrome wire is

60 %

40 %

37 %

63 %

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17. Joule/coulomb is equal to

ampere

Volt

Watt

None of these

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18. Which of the following combination is used in domestic purpose ?

Parallel

Series

Mixed

All

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19. A.C. generator converts

Mechanical energy –>electrical energy

Electrical energy –> mechanical energy

Mechanical energy –> heat energy

Sound energy –>electrical energy

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20. Neutral wire is

Yellow in colour

Green in colour

Black in colour

Red in colour

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21. Which of the following gas is used in electric bulb (filament lamp )?

N₂

Both Ar & N₂

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22. Which of the following factor is same in parallel connection?

Current

Resistance

Voltage or p.d

Fuse

23 / 30

23. The angle of dip at equator is

0⁰

17⁰

42⁰

90⁰

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24. If V be voltage ,I be current and Ρ be power of circuit then which of the relation is correct ?

P=Vi

P=iR

V=iP

i=PV

25 / 30

25. Fuse is an alloy of

Cu+ Sn

Cr+Ni

Cu+Ni

Sn+Pb

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26. The unit of charge is equal to

Ampere

Watt

Coulomb

Tesla

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27. Life time of mercury lamp is

1000 hr

2000 hr

3000 hr

4000 hr

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28. Nichrome heaters have

High resistivity, high melting point

High resistivity , low melting point

Low resistivity, low melting point

Low resistivity, high melting point

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29. Colour of live wire is

Blue

Yellow

Red

Green

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30. The angle of dip at pole is

0⁰

17⁰

42⁰

90⁰

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