The magnetic susceptibility is negative for
|
(a) Paramagnetic materials |
|
(b) Diamagnetic materials |
|
(c) Ferromagnetic materials |
|
(d) Paramagnetic and ferromagnetic materials |
(b) Diamagnetic materials
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The plates of a parallel plate condenser are pulled apart with a velocity v. If at any instant their mutual distance of separation is d, then the magnitude of the time of rate of change of capacity depends on d as follows
|
(a) |
(b) |
(c) |
(d) d |
In the given reaction 
Radioactive radiations are emitted in the sequence
|
(a) α, β,γ |
(b) β ,α, γ |
(c) γ ,α, β |
(d) β , γ ,α |
Dynamo core is laminated because
|
(a) Magnetic field increases |
|
(b) Magnetic saturation level in core increases |
|
(c) Residual magnetism in core decreases |
|
(d) Loss of energy in core due to eddy currents decreases |
The work done in bringing a 20 coulomb charge from point A to point B for distance 0.2m is 2J. The potential difference between the two points will be (in volt)
|
(a) 0.2 |
(b) 8 |
(c) 0.1 |
(d) 0.4 |
