Question
The example for non-ohmic resistance is
|
(a) Copper wire |
(b) Carbon resistance |
(c) Diode |
(d) Tungston wire |
The example for non-ohmic resistance is
|
(a) Copper wire |
(b) Carbon resistance |
(c) Diode |
(d) Tungston wire |
(c) Diode
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When the speed of a dc motor increases the armature current
|
(a) Increases |
|
(b) Decreases |
|
(c) Does not change |
|
(d) Increases and decreases continuously |

Which of the following is used as a moderator in nuclear reactors
|
(a) Uranium |
(b) Heavy water |
(c) Cadmium |
(d) Plutonium |
Two wires have resistance of 2W and 4W connected to same voltage, ratio of heat dissipated at resistance is
|
(a) 1 : 2 |
(b) 4 : 3 |
(c) 2 : 1 |
(d) 5 : 2 |
The temperature coefficient of resistance of a conductor is
|
(a) Positive always |
(b) Negative always |
(c) Zero |
(d) Infinite |