None of the above
The total charge induced in a conducting loop when it is moved in magnetic field depends on
the rate of change of magnetic flux
initial magnetic flux only
the total change in magnetic flux
final magnetic flux only
Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius r with constant speed v. The time period of the motion is :
Depends on v are not on R
Depends on both R and v
Is independent of both R and v
Depends on R and not on v
At what distance from a long straight wire carrying a current of 12 A will the magnetic field be equal to 3 x 10-5 Wb/m2?
8 × 10-2 m
12 × 10-2 m
18 × 10-2 m
24 × 10-2 m
Tesla is the unit of
magnetic flux
magnetic field
magnetic induction
magnetic moment
The magnetic field at a distance r from a long wire carrying current I is 0.4 T. The magnetic field at a distance 2r is
0.2 T
0.8 T
0.1 T
1.6 T
A deutron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 m in a plane perpendicular to magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 m in the same plane with the same B is
25 keV
50 keV
200 keV
100 keV
A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is :
2B
4B
B/2
B
If a long hollow copper pipe caries a current, then magnetic field is produced
Inside the pipe only
Outside the pipe only
Both inside and outside the pipe
No magnetic field is produced
Current is flowing in a coil of area A and number of turns N, then magnetic moment of the coil, M is equal to
NiA
Ni/A
N2Ai
