If a current is passed in a spring, it
|
(a) Gets compressed |
(b) Gets expanded |
(c) Oscillates |
(d) Remains unchanged |
If a current is passed in a spring, it
|
(a) Gets compressed |
(b) Gets expanded |
(c) Oscillates |
(d) Remains unchanged |
(a) Gets compressed
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Two wires A and B of same material and same mass have radius 2rand r. If resistance of wire A is 34 Ω, then resistance of B will be
|
(a) 544 Ω |
(b) 272 Ω |
(c) 68 Ω |
(d) 17 Ω |
The current flowing in a copper voltameter is 3.2 A. The number of copper ions (
deposited at the cathode per minute is
|
(a) 0.5 |
(b) 1.5 |
(c) 3 |
(d) 6 |
Dynamo is a device for converting
|
(a) Electrical energy into mechanical energy |
|
(b) Mechanical energy into electrical energy |
|
(c) Chemical energy into mechanical energy |
|
(d) Mechanical energy into chemical energy |
A laser beam of pulse power 1012 watt is focussed on an object are 10–4 cm2. The energy flux in watt/ cm2 at the point of focus is
|
(a) 1020 |
(b) 1016 |
(c) 108 |
(d) 104 |
The potential at a point, due to a positive charge of 100μC at a distance of 9m, is
|
(a) |
(b) |
(c) |
(d) |
In the circuit given, the correct relation to a balanced Wheatstone bridge is
|
(a) |
(b) |
(c) |
(d) None of these |