- AElectric field.
- BElectric flux.
- CCharge.
- DGaussian surface area.
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Which of the following graphs shows the variation of thermoelectric power with temperature difference between hot and cold junction in thermocouples
|
(a) |
(b) |
(c) |
(d) |
The radio waves of frequency 300 MHz to 3000 MHz belong to
|
(a) High frequency band |
(b) Very high frequency band |
|
(c) Ultra high frequency band |
(d) Super high frequency band |
If the two ends P and N of a P-N diode junction are joined by a wire
|
(a) There will not be a steady current in the circuit |
|
(b) There will be a steady current from N side to P side |
|
(c) There will be a steady current from P side to N side |
|
(d) There may not be a current depending upon the resistance of the connecting wire |
The colour of a star is an indication of its
|
(a) Weight |
(b) Distance |
(c) Surface temperature |
(d) Size |
Through which mode of propagation, the radio waves can be sent from one place to another
|
(a) Ground wave propagation |
(b) Sky wave propagation |
|
(c) Space wave propagation |
(d) All of them |