- AVoltage Difference
- BCurrent
- CTemperature difference
- DChemical Imbalance
Explanation:
When a potential difference is applied across a resistor then randomly moving free electrons start to move towards positive terminal due to force applied by electric field generated due to voltage difference. thus a start to Current Flows from High Voltage to Low Voltage.
Voltage is cause and current is effect.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A moving charge will gain energy due to the application of
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(a) Electric field |
(b) Magnetic field |
(c) Both of these |
(d) None of these |
In NPN transistor, 1010 electrons enters in emitter region in 10–6 sec. If 2% electrons are lost in base region then collector current and current amplification factor (b) respectively are
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(a) 1.57 mA, 49 |
(b) 1.92 mA, 70 |
(c) 2 mA, 25 |
(d) 2.25 mA, 100 |
In a forward biased PN-junction diode, the potential barrier in the depletion region is of the form …
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(a)
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(b)
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(c)
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(d)
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In a double slit experiment, instead of taking slits of equal widths, one slit is made twice as wide as the other. Then in the interference pattern
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(a) The intensities of both the maxima and the minima increase |
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(b) The intensity of maxima increases and the minima has zero intensity |
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(c) The intensity of maxima decreases and that of the minima increases |
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(d) The intensity of maxima decreases and the minima has zero intensity |
Assertion : The cloud in sky generally appear to be whitish.
Reason : Diffraction due to cloud is efficient in equal measure at all wavelengths.
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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. |
When unpolarised light beam is incident from air onto glass (n = 1.5) at the polarising angle
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(a) Reflected beam is polarised 100 percent |
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(b) Reflected and refracted beams are partially polarised |
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(c) The reason for (a) is that almost all the light is reflected |
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(d) All of the above |
In double slits experiment, for light of which colour the fringe width will be minimum
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(a) Violet |
(b) Red |
(c) Green |
(d) Yellow |