- Introduction
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- Biot Savart Law
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- Comparison between Coulomb’s laws and Biot Savart laws
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- Applications of Biot Savart law
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- Magnetic Field due to steady current in an infinitely long straight wire
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- Force between two long and parallel current carrying conductor
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- Magnetic Field along axis of a circular current carrying coil
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- Magnetic Field at the center of a current carying arc
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- Ampere's circuital law
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- Magnetic field of a solenoid
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- Magnetic Field of a toriod
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Find the force on the straight conductor of length .30 m carrying a current of 5 .0 A in the –

Solution

A current sheet having current K A/m is placed at in the x-y plane at z=0.The direction of current is -

Find the Magnetic Field at on the z axis

Solution

A current sheet where current per unit length is 6.0 A/m and direction is towards +

a) 47 A, i

b) 47.1 A, -

c) 50 A,

d) 50 A, -

Solution

A charged particle whose mass is 19.9 ×10

What is the force acting on the charge, centripetal acceleration and radius of the circle in which charged particle moves

a) 3.6×10

b) 3.0×10

c) 3.0×10

d) None of the above

Solution

Which of the following is true?

A) Magnetic field exerts force only a moving charge.

B) Electric field exerts force on both stationary and moving charge

C) Magnetic field exerts force on charge moving parallel to the direction of the field

D) All the above

Solution

Four Particles P

Match the following

Column A

A) what all particle will not be deflected by the Magnetic field

B) What all particles will be deflected by the Magnetic Field?

C) Which particle move in a circular path of maximum radius

D) Which particle will experience maximum Force?

Column B

P) P

Q) P

R) P

S) P

Solution

The force experienced by a particle of charge q moving with a velocity

Statement I: The vectors

Statement II: The vectors

Statement III: The vectors

a) All the statements are true

b) Statement I and II are true only

c) Statement I and III are true only

d) Statement II and III are true only

Solution

A long wire is bent as shown in figure. Find the magnitude and direction of the magnetic field at the center of the circular part if a current of I amp is passed through the wire

The different parts of the wire do not touch each other at Q

Solution

A non-conducting thin disc of Diameter D charged uniformly over one side with surface density $\sigma $ rotates about its axis with an angular velocity $\omega $

What is the magnetic field at the center of the disc?

Solution

A charged particle moving with constant velocity passes through a space without any change in velocity

Electric Field in the region is given by the

Magnetic Field in the region is given by the

Where a

Which of the following can be true about the region?

a) a

b) a

c) a

d) a

Solution

A charged particle of mass m and charge q moves with a constant velocity along the positive x direction

it enters a region of Magnetic field which is directed towards positive z direction from x=a which is given by

Find the initial acceleration of the particle

a)

b)

d) none of these

Solution

Find the radius of the circular path which the particle moves

a) mb/qa

b) ma/q

c) mab/q

d) None of these

Solution

Which of the following is true about the motion of the particle?

a) Force will always be perpendicular to the velocity

b) The magnitude of the velocity remains constant

c) velocity vector and magnetic field vector remains perpendicular to each other during the motion

d) KE of the particle remains constants

Solution

The frequency of the rotation

a) depends on the value a

b) depends on the value b

c) depends on the value a and b both

d) Does not depend on a and b both

Solution

Four circular coil( A,B,C,D) having radius r,2r,3r,4r having numbers of turns 4n,3n,2n,n and carrying the same current are there.

P) which coil will produce maximum Magnetic induction at the center

Q) which coil will produce minimum Magnetic induction at the center

R) Which coil has maximum magnetic moment per turn

S) Which coil has minimum magnetic moment per turn

E) A

F) B

G) C

H) D

Solution

An infinite long thin cylinder of radius R is carrying current I along the axial direction.

Which of the following is true?

a) B =0 for r< R

b) B =k/r for r > R

c) B=kr for r> R

d) none of the above

Solution

Class 12 Maths Class 12 Physics

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