Two coaxial solenoids of different radii carry current I in the same direction. Let F 1 → be the magnetic force on the inner solenoid due to the outer one and F 2 → be the magnetic force on the outer solenoid due to the inner one. Then:

F 1 → is radially outwards and F 2 → = 0

F 1 → is radially inwards and F 2 → is radially outwards

F 1 → is radially inwards and F 2 → = 0

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The correct curve between the magnetic induction along the axis of a along solenoid due to current flow i in it and distance $x$ from one end is

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Important Questions on Magnetic Effect of Current

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 54

A long solenoid has

200

turns per cm

and carries a current of

2.5 Amps

. The magnetic field at its center is

(μ_{0} = 4 π \times 10^{- 7} weber / amp - m)

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 55

In a coaxial, straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is non-zero

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 56

A wire is wound on a long rod of material of relative permeability

μ_{r} = 4000

to make a solenoid. If the current through the wire is

5 A

and number of turns per unit length is

1000

per metre, then the magnetic field inside the solenoid is :

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 57

A cylindrical wire of radius

R

is carrying uniformly distributed current

i

cross–section. If a circular loop of radius

r

is taken as amperian loop, then the variation value of

\oint \vec{B} . \vec{d l}

over this loop with radius ‘

r

’ of loop will be best represented by

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 58

A current

I

flows along the length of an infinitely long, straight, thin walled pipe. Then

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 60

A long, thick straight conductor of radius

R

carries current

I

uniformly distributed in its cross section area. The ratio of energy density of the magnetic field at distance

R / 2

from surface inside the conductor and outside the conductor is :

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 61

A coaxial cable is made up of two conductors. The inner conductor is solid and is of radius $R_{1}$ the outer conductor is hollow of inner radius $R_{2}$ and outer radius $R_{3} .$ The space between the conductors is filled with air. The inner and outer conductors are carrying currents of equal magnitudes and in opposite directions. Then the variation of magnetic field with distance from the axis is best plotted as

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 62

When a charged particle moves at right angles to a magnetic field, then which of the following quantities changes,

The correct curve between the magnetic induction along the axis of a along solenoid due to current flow i in it and distance x from one end is

Important Questions on Magnetic Effect of Current

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The correct curve between the magnetic induction along the axis of a along solenoid due to current flow i in it and distance $x$ from one end is