Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 27

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Acceleration experienced by a particle with specific charge $1 \times 10^{7} C {kg}^{- 1}$ when fired perpendicular to a magnetic field of induction $100 μ T$ with a velocity $10^{5} m s^{- 1}$ is

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Important Questions on Moving Charges and Magnetism

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 28

A conducting circular loop of radius

r

carries a constant current

i

. It is placed in a uniform magnetic field

B

such that

B

is perpendicular to the plane of the loop. The magnetic torque acting on the loop is-

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 29

A closely wound solenoid of

2000

turns and area of cross-section

1.5 \times 10^{- 4} m^{2}

carries a current of

2.0 A

. It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field

5 \times 10^{- 2} T

, making an angle of

30^{o}

with the axis of the solenoid. The torque on the solenoid will be

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 30

A magnetic needle suspended parallel to a magnetic field requires

\sqrt{3} J

of work to turn it through

60 °

. The torque needed to maintain the needle in this position will be

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 31

The intensity of a magnetic field is indicated by the number of lines of _____.

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 32

Space of magnetism around the magnet, where magnetic influences can be experienced by a magnetic material, is called _____.

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 33

A current loop placed in a non-uniform magnetic field experiences a force and a _____ .

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 34

The deflection is indicated by the scale by a pointer in a galvanometer is _____ proportional to the current.

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 35

Increasing the current sensitivity may not necessarily increase the _____.