Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction JEE Main & Advanced>Chapter 2 - Sources of Magnetic Field>DPP>Q 11

HARD

JEE Main

IMPORTANT

Earn 100

From a cylinder of radius $R,$ a cylinder of radius $R / 2$ is removed, as shown. Current flowing in the remaining cylinder is $I$ . Magnetic field strength is

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Important Questions on Sources of Magnetic Field

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JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction JEE Main & Advanced>Chapter 2 - Sources of Magnetic Field>DPP>Q 12

A winding wire which is used to frame a solenoid can bear a maximum

10 A

current. If the length of solenoid is

80 cm

and its cross-sectional radius is

3 cm,

then required length of winding wire is

(B = 0.2 T)

HARD

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction JEE Main & Advanced>Chapter 2 - Sources of Magnetic Field>DPP>Q 13

A cylindrical conductor of radius '

R

' carries a current '

i

'. The value of magnetic field at a point, which is

R / 4

distance inside from the surface, is

10 T

. Find the value of magnetic field at point which is

4 R

distance outside from the surface.

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JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction JEE Main & Advanced>Chapter 2 - Sources of Magnetic Field>DPP>Q 14

Two coaxial solenoids

1

and

2

of the same length are set so that one is inside the other. The number of turns per unit length are

n_{1}

and

n_{2}

. The currents

i_{1}

and

i_{2}

are flowing in opposite directions. The magnetic field inside the inner coil is zero. This is possible when

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JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction JEE Main & Advanced>Chapter 2 - Sources of Magnetic Field>DPP>Q 15

Two identical current carrying co-axial loops, carry current

I

in an opposite sense. A simple amperian loop passes through both of them once. Calling the loop as

C