A constant voltage is applied between the two ends of a metallic wire. If both the length and the radius of the wire are doubled, the rate of heat developed in the wire
|
(a) Will be doubled |
(b) Will be halved |
|
(c) Will remain the same |
(d) Will be quadrupled |
(a) Will be doubled
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The graph which represents the relation between the total resistance R of a multi range moving coil voltmeter and its full scale deflection V is
|
(a) (i) |
(b) (ii) |
(c) (iii) |
(d) (iv) |
A diamagnetic material in a magnetic field moves
|
(a) From weaker to the stronger parts of the field |
|
(b) Perpendicular to the field |
|
(c) From stronger to the weaker parts of the field |
|
(d) In none of the above directions |
In a hydrogen atom, the distance between the electron and proton is 2.5 
. The electrical force of attraction between them will be
|
(a) 2.8 |
(b) 3.7 |
(c) 6.2 |
(d) 9.1 |
