What is the equivalent resistance between A and B
|
(a) |
(b) |
(c) |
(d) 2R |
What is the equivalent resistance between A and B
|
(a) |
(b) |
(c) |
(d) 2R |
(c)
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Masses of three wires of copper are in the ratio of 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 : 1. The ratio of their electrical resistances are
|
(a) 1 : 3 : 5 |
(b) 5 : 3 : 1 |
(c) 1 : 15 : 125 |
(d) 125 : 15 : 1 |
Two capacitors of capacities and
are charged to voltages
and
respectively. There will be no exchange of energy in connecting them in parallel, if
|
(a) |
(b) |
(c) |
(d) |
Nucleus produced due to a-decay of the nucleus
is
|
(a) |
(b) |
(c) |
(d) |
If scattering particles are 56 for 90° angle then this will be at 60° angle
|
(a) 224 |
(b) 256 |
(c) 98 |
(d) 108 |

In an hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53 . Then the electrical potential produced by the nucleus at the position of the electron is
|
(a) – 13.6 V |
(b) – 27.2 V |
(c) 27.2 V |
(d) 13.6 V |
Assertion : Charge is invariant.
Reason : Charge does not depends on speed of frame of reference.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |