Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 3

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The time period of a charge particle which is. projected in a magnetic field $B$ with velocity $\vec{v}$ at an angle $θ$ with the direction of magnetic field is

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Important Questions on Moving Charges and Magnetism

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 4

An electron moving with constant velocity passes through a region of space without change in its velocity. If

E

and

B

represent electric and magnetic field respectively, the region of space may have

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 5

Ratio of magnetic fields at

10 cm

and

20 cm

from a infinitely long current carrying wire is

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 6

A current

I

flows in a circular arc of wire whose radius is

R,

which subtends an angle

\frac{2 π}{9}

radian at its centre. The magnetic field

B

at the centre is

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 7

The magnitude of magnetic field induction at the centre $O$ in the figure shown is (Given: $R_{1} = 10 cm, R_{2} = 20 cm$ and $i = 1 A)$

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 8

Two long wires one carrying current

1 A

and other carrying

2 A

in the same direction are placed parallel to each other produces a net magnetic field

B

at the mid-point. What will be the field at midpoint when current

1 A

is switched off ?

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 9

A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at

\frac{a}{4}

inside and

\frac{a}{4}

outside from the surface of wire is

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 10

The magnitude of magnetic field required to accelerate protons (mass

= 1.67 \times 10^{- 27} kg)

in a cyclotron that is operated at an oscillator frequency

10 MHz

is approximately

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 11

A large solenoid of windings of

400

turns per meter carries a current

5 A .

The magnetic field at the centre of the solenoid is about