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Class 10

Explore popular questions from Magnetic Effects of Electric Current for Class 10. This collection covers Magnetic Effects of Electric Current previous year Class 10 questions hand picked by experienced teachers.

Magnetic Effects of Electric Current

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Q 1. A charge whenever in motion has

A

only magnetic field linked with it

B

only electric field linked with it

Both electric and magnetic field linked with it

D

only gravitational field linked with it.

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Q 2. Magnetic forces

A

are always attractive

B

are always repulsive

may be attractive or repulsive

D

none of these

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Q 3. Magnetic field is generated by

A

stone

B

mud

magnet

D

iron piece

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Q 4. A magnetic needle comes to rest in

A

geographic east-west direction

geographic North-South direction

C

Vertical direction

D

In North-East direction

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Q 5. The device used for producing electric current is called

generator

B

galvanometer

C

ammeter

D

motor

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Q 6. In an electric motor, conversion takes place of

A

Chemical energy into electrical energy

Electrical energy into mechanical energy

C

Electrical energy into light

D

Electrical energy into chemical energy

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Q 7. A magnet can be demagnetised by

Hammering the magnet

B

Putting it in the water

C

Cooling it

D

Putting in contact with iron

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Q 8. Which one of the following is the magnetic substance

A

Mercury

Iron

C

Gold

D

Silver

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Q 9. Generally permanent magnets are prepared from

A

Gold

B

Silver

C

Iron

Steel

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Q 10. If iron filings are sprinkled around a bar magnet then they arrange in a fixed pattern which is

A

magnetic field lines pattern

Electric field lines pattern

C

Faraday's electric field lines pattern.

D

None of these

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Q 11. A vertical wire is carrying current in the upward direction. Then the direction of magnetic field in the west direction will be

towards south

B

towards east

C

towards west

D

towards north

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Q 12. A charge of 1.6 {tex}\times{/tex} 10{tex}^{-19}{/tex} C enters in the magnetic field of 3 tesla normally with a velocity of 106 m/s. The force on the charge will be

A

4.8 {tex}\times{/tex} 10{tex}^{-12}{/tex} m/s

4.8 {tex}\times{/tex} 10{tex}^{-13}{/tex} m/s

C

4.8 {tex}\times{/tex} 10{tex}^{-14}{/tex} m/s

D

2 {tex}\times{/tex} 10{tex}^{-19}{/tex} m/s

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Q 13. The magnetic field due to an infinitely long wire carrying a current of 2A at a distance of 10 m from it is

A

2 {tex}\times{/tex} 10{tex}^{-8}{/tex} T

4 {tex}\times{/tex} 10{tex}^{-8}{/tex} T

C

4{tex}\pi{/tex} {tex}\times{/tex} 10{tex}^{-8}{/tex} T

D

2 {tex}\times{/tex} 10{tex}^{-6}{/tex} T

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Q 14. The device used for producing electric current is called a

generator

B

galvanometer

C

ammeter

D

motor

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Q 15. {tex}\mathrm{Assertion}{/tex}: A magnetic field is produced around a current carrying conductor.
{tex}\mathrm{Reason}{/tex}: This was experimentally proved by Oersted.

Both Assertion and Reason are true and Reason is the correct explanation of 'Assertion'

B

Both Assertion and Reason are true and Reason is not the correct explanation of 'Assertion'

C

Assertion is true but Reason is false

D

Assertion is false but Reason is true

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Q 16. {tex}\mathrm{Assertion}{/tex}: A changed particle (+vely charged) when enters normally to the magnetic field follows an elliptical path.
{tex}\mathrm{Reason}{/tex}: The magnetic force on the charged particle provides the necessary centripetal force

A

Both Assertion and Reason are true and Reason is the correct explanation of 'Assertion'

B

Both Assertion and Reason are true and Reason is not the correct explanation of 'Assertion'

C

Assertion is true but Reason is false

Assertion is false but Reason is true

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Q 17.

Column IColumn II
(A) B = {tex}\frac{\mu_0}{4\pi}{/tex}{tex}\frac{2I}{r}{/tex}(P) Force on a charged particle q moving with a velocity v in a magnetic field
(B) F = Bqv sin{tex}\theta{/tex}(Q) Fleming's left-hand rule
(C) Force on a current carrying conductor(R) r = {tex}\frac{mv}{qB}{/tex} in a magnetic field
(D) Radius of the circular path of a charged(S) Magnetic field due to particle in a magnetic field an infinitely long wire.

A

A - P

B

B - Q

C - Q

D

D - P

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Q 18. When North pole of magnetic approaches a circular coil, then the current in the coil as seen from the magnet side is

A

clockwise

anticlockwise

C

parallel

D

antiparallel

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Q 19. A vertical wire carries a current upward. The magnetic field north of the wire will be directed

A

upward

B

eastward

westward

D

northward

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Q 20. The magnetic flux is expressed in

A

dyne

B

Oested

C

Gauss

Weber

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Q 21. The magnetic field lines have which of the following properties

A

They are closed curves

B

Field lines don't intersect

Both A and B

D

None of the above

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Q 22. Which of the following are magnetic materials?

A

Gold

B

Iron

C

Steel

Both B and C

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Q 23. Magnetic field due to a current carrying solenoid on its axis is

A

constant

B

At ends B= {tex}\frac{\mu_0nI}{2}{/tex}

C

B = {tex}\mu_0{/tex}nI

All of the above

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Q 24. Lenz's law explains the following

A

direction of induced emf

B

direction of induced current

C

conservation of energy

All of the above

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Q 25.

Column-IColumn-II (Devices) (Components used in given devices)
(A) Electric motor(P) Current carrying conductors
(B) Electromagnet(Q) Magnets
(C) AC Generator(R) Commutator
(D) Loud speakers(S) Brushes

A

A - S

B

B - Q

C

C - P

D - R