Two long parallel wires carrying equal current separated by 1m, exert a force of 2 
on one another. The current flowing through them is
|
(a) 2.0 A |
(b) 2.0 |
(c) 1.0 A |
(d) 1.0 |
(c) 1.0 A
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In the following circuit, bulb rated as 1.5 V, 0.45 W. If bulbs glows with full intensity then what will be the equivalent resistance between X and Y
|
(a) 0.45 W |
(b) 1 W |
(c) 3 W |
(d) 5 W |
The true statement is, on increasing the distance between the plates of a parallel plate condenser
|
(a) The electric intensity between the plates will decrease |
|
(b) The electric intensity between the plates will increase |
|
(c) The electric intensity between the plates will remain unchanged |
|
(d) The P.D. between the plates will decrease |
The magnetic potential at a point on the axial line of a bar magnet of dipole moment M is V. What is the magnetic potential due to a bar magnet of dipole moment 
at the same point
| (a) 4V | (b) 2V |
(c) 
|
(d) 
|
A particle of mass 0.6 g and having charge of 25 nC is moving horizontally with a uniform velocity 1.2 
in a uniform magnetic field, then the value of the magnetic induction is 
|
(a) Zero |
(b) 10 T |
(c) 20 T |
(d) 200 T |
A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will
|
(a) Become infinite |
(b) Become small, but non–zero |
|
(c) Remain unchanged |
(d) Become zero |
A thermocouple is made of Cu and Fe. If a battery is connected in it, then
|
(a) Both junctions will be at the same temperature |
|
(b) Both junctions will become hot |
|
(c) One junction will be hotter than the other |
|
(d) None of these |
