# ELECTRO MAGNETIC INDUCTION TEST-2

The electron in the beam of a television tube move horizontally from south to north. The vertical component of the earth's magnetic field points down. The electron is deflected towards ____.
West
No deflection
East
North to south
An electric field of 1500 V / m and a magnetic field of 0.40 weber / meter2 act on a moving electron. The minimum uniform speed along a straight line the electron could have is ____.
1.6 ( 1015 m / s
6 ( 10-16 m / s
3.75 ( 103 m / s
3.75 ( 102 m / s
An electron, moving in a uniform magnetic field of induction of intensity  has its radius directly proportional to ____.
Its charge
Magnetic field
Speed
None of the above
A rectangular coil ABCD is rotated anticlockwise with a uniform angular velocity about the axis shown in diagram below. The axis of rotation of the coil as well as the magnetic field B is horizontal. The induced e.m.f. in the coil would be maximum when ____. 
The plane of the coil is horizontal
The plane of the coil makes an angle of 45° with the magnetic field
The plane of the coil is at right angles to the magnetic field
The plane of the coil makes an angle of 30° with the magnetic field
An electric potential difference is induced between the ends of the conductor shown in the diagram, when the conductor moves in the direction ____. 
P
Q
L
M
Two rails of a railway track insulated from each other and the ground are connected to a milli voltmeter. What is the reading of voltmeter, when a train travels with a speed of 180 km/hr along the track? Given that the vertical component of earth's magnetic field is  and the rails are separated by 1 metre?
1 volt
When a wire loop is rotated in a magnetic field, the direction of induced e.m.f. changes once in each ____.
1 revolution
2 revolution
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field ____. 
In the plane of paper pointing towards right
In the plane of paper pointing towards left
Perpendicular to the plane of paper and downwards
Perpendicular to the plane of paper and upwards
The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced emf in the rod ____. 
End A is at lower potential with respect to B
A and B is at the same potential
There is no induced e.m.f. in the rod
Potential at A is higher than that at B
A two metre wire is moving with a velocity of 1 m/s perpendicular to a magnetic field of 0.5 weber/m2. The e.m.f. induced in it is ____.
0.5 volt
0.1 volt
1 volt
2 volt
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ELECTRO MAGNETIC INDUCTION TEST

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