A proton of mass 1 . 67 × 10 - 27 kg and charge 1 . 6 × 10 - 19 C is projected with a speed of 2 × 10 6 m s - 1 at an angle of 60 ° to the X -axis. If a uniform magnetic field of 0 . 104 Tesla is applied along Y - a x i s , the path of proton is-

a helix of radius = 0 . 1 m and time period 2 π × 10 - 7 s

a circle of radius = 0 . 2 m and time period π × 10 - 7 s

a circle of radius = 0 . 1 m and time period 2 π × 10 - 7 s

a helix of radius = 0 . 2 m and time period 4 π × 10 - 7 s

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Magnetic field at the centre of a coil in the form of a square of side $4 cm$ carrying current of $5 A$ is -

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Important Questions on Electromagnetism

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 56

A toroid has a core of outer radius

26 cm

and inner radius

25 cm

around which

4000

turns of conducting wire are wound. If current in the wire is

10 A

, magnetic field inside the core of the toroid is-

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 57

$A$ and $B$ are two concentric coils of centre $O$ and carry currents $I_{1}$ and $I_{2}$ are shown in Fig. $8.133 .$ If the ratio of their radii $1 : 2$ and the ratio of the flux densities at O due to $A$ and $B$ is $1 : 3,$ then value of $\frac{I_{1}}{I_{2}}$ is-

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 58

An electron is travelling along

X -

direction. It encounters a magnetic field in

Y -

direction. Its subsequent motion will be-

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 59

Two particles

X

and

Y

having equal charges, after being accelerated through the same potential difference enter a region of uniform magnetic field and describes circular paths of radii

r_{1}

and

r_{2}

respectively. The ratio of the mass of

X

and

Y

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 62

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If

E .

and

B

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

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 63

A particle of charge

- 16 \times 10^{- 18} C

moving with velocity

10 m s^{- 1}

along the

X

-axis enters a region where a magnetic field of induction

B

is along the

y -

axis, and an electric field of magnitude

10^{4} V / m

is along the negative

Z -

axis. If the charged particle continues moving along the

X -

axis, the magnitude of

B

is-

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 64

A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointed in the same direction-

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 8 - Electromagnetism>EXERCISE 8>Q 68

A proton of mass

1.67 \times 10^{- 27} kg

and charge

1.6 \times 10^{- 19} C

is projected with a speed of

2 \times 10^{6} m s^{- 1}

at an angle of

60 °

to the

X

-axis. If a uniform magnetic field of

0.104

Tesla is applied along

Y - a x i s,

the path of proton is-

Magnetic field at the centre of a coil in the form of a square of side 4 cm carrying current of 5 A is -

Important Questions on Electromagnetism

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Magnetic field at the centre of a coil in the form of a square of side $4 cm$ carrying current of $5 A$ is -