According to Joule's law, if the potential difference across a conductor having a material of specific resistance remains constant, then the heat produced in the conductor is directly proportional to
|
(a) ρ |
(b) |
(c) |
(d) |
(d) 
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A uniform wire of 16 Ω is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance 16 Ω. The effective resistance between the other two opposite corners is
|
(a) 32 Ω |
(b) 20 Ω |
(c) 8 Ω |
(d) 4 Ω |
A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes through the coil. When it is converted to a 10 A ammeter, the shunt resistance is
|
(a) 0.01 W |
(b) 0.05 W |
(c) 2000 W |
(d) 5000 W |
A silver and zinc voltameter are connected in series and a current i is passed through them for a time t liberating W gm of zinc. The weight of silver deposited is nearly
|
(a) W |
(b) 1.7 W |
(c) 2.4 W |
(d) 3.5 W |
Figure shows three points A, B and C in a region of uniform electric field 
. The line AB is perpendicular and BC is parallel to the field lines. Then which of the following holds good. Where 
and 
represent the electric potential at points A, B and C respectively
|
(a) |
(b) |
(c) |
(d) |
Can a metal be used as a medium for dielectric
|
(a) Yes |
(b) No |
(c) Depends on its shape |
(d) Depends on dielectric |
In the depletion region of an unbiased P-N junction diode there are
| (a) Only electrons | (b) Only holes |
| (c) Both electrons and holes | (d) Only fixed ions |
