- Ajoining high resistor in parallel
- Bjoining low resistor in series
- ✓joining high resistor in series
- Djoining low resistor in parallel
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An inductance L and a resistance R are first connected to a battery. After some time the battery is disconnected but L and R remain connected in a closed circuit. Then the current reduces to 37% of its initial value in
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(a) RL sec |
(b) |
(c) |
(d) |
TV waves have a wavelength range of 1-10 meter. Their frequency range in MHz is
| (a) 30-300 | (b) 3-30 | (c) 300-3000 | (d) 3-3000 |
A student has 10 resistors of resistance ‘r’. The minimum resistance made by him from given resistors is
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(a) 10 r |
(b) |
(c) |
(d) |
The fringe width in Young’s double slit experiment increases when
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(a) Wavelength increases |
(b) Distance between the slits increases |
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(c) Distance between the source and screen decreases |
(d) The width of the slits increases |
Assertion : Base in a transistor is made very thin as compared to collector and emitter regions.
Reason : Due to thin base power gain and voltage gain is obtained by a transistor.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |