iC is slightly smaller than iE.
iB is much smaller than iE.
Explanation:
The highlighted parts could not be edited, as the meaning could not be understood. Also, please check the last line for logical accuracy. Only one option is given as correct, while the solution gives two correct options.
We know that in the transistor base is slightly doped, therefore when the majority carriers due to forward biasing of emitter base junction, feel the repulsive force from the battery and pass over to the base region. This gives the emitter current iE.
As the base is thin and lightly doped, only few majority carriers of the emitter are neutralised at the base. This gives the base current.
Hence, base current (iB) is low.
The remaining majority carriers of the emitter pass to the collector and give collector current iC.
Thus, we get the relation given below:
iE = iB + iC
Thus, because of the base, current iC is slightly smaller than iE.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance is
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(a) 6 W, 5 amp |
(b) 10 W, 0.1 amp |
(c) 4 W, 1.0 amp |
(d) 12 W, 0.5 amp |
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(a) + 0.04 A |
(b) + 0.02 A |
(c) – 0.03 A |
(d) – 0.01 A |
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(a) The electron will turn to its right |
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(b) The electron will turn to its left |
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(c) The velocity of the electron will increase |
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(d) The velocity of the electron will remain unchanged |
Seven capacitors each of capacity 2μF are to be so connected to have a total capacity 
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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 the following Wheatstone bridge P/Q = R/S. If key K is closed, then the galvanometer will show deflection
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(a) In left side |
(b) In right side |
(c) No deflection |
(d) In either side |
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| (c) 3.456 × 20–25 kg-m/sec | (d) 3.313 × 10–22 kg-m/sec |
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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. |
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(a) 1.5 |
(b) 2.5 |
(c) 3.5 |
(d) 4.5 |
In a hydrogen atom, an electron moves in a circular orbit of radius 5.2 
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(a) 6.53 |
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(c) 9.6 |
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