A semiconductor dopped with a donor impurity is
|
(a) P-type |
(b) N-type |
(c) NPN type |
(d) PNP type |
A semiconductor dopped with a donor impurity is
|
(a) P-type |
(b) N-type |
(c) NPN type |
(d) PNP type |
(b) N-type
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Assertion : A transistor is a voltage-operating device.
Reason : Base current is greater than the collector current.
|
(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. |
The valence of an impurity added to germanium crystal in order to convert it into a P-type semi conductor is
|
(a) 6 |
(b) 5 |
(c) 4 |
(d) 3 |
Two parallel plates have equal and opposite charge. When the space between them is evacuated, the electric field between the plates is 2 . When the space is filled with dielectric, the electric field becomes 1
. The dielectric constant of the dielectric material
|
(a) 1/2 |
(b) 1 |
(c) 2 |
(d) 3 |
A magnet NS is suspended from a spring and while it oscillates, the magnet moves in and out of the coil C. The coil is connected to a galvanometer G. Then as the magnet oscillates,

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(a) G shows deflection to the left and right with constant amplitude |
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(b) G shows deflection on one side |
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(c) G shows no deflection. |
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(d) G shows deflection to the left and right but the amplitude steadily decreases. |
In the figure given below, the current passing through 6 Ω resistor is
|
(a) 0.40 ampere |
(b) 0.48 ampere |
(c) 0.72 ampere |
(d) 0.80 ampere |
An electromagnetic wave, going through vacuum is described by. Which of the following is independent of wavelength
| (a) k | (b) w | (c) k/w | (d) kw |