The work function of a photoelectric material is 3.3 eV. The threshold frequency will be equal to
|
(a) 8 |
(b) 8 |
(c) 8 |
(d) 8 |
The work function of a photoelectric material is 3.3 eV. The threshold frequency will be equal to
|
(a) 8 |
(b) 8 |
(c) 8 |
(d) 8 |
(d) 8
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assuming that universe is expanding, if the spectrum of light coming from a star which is going away from earth is tested, then in the wavelength of light
|
(a) There will be no change |
|
(b) The spectrum will move to infrared region |
|
(c) The spectrum will seems to shift to ultraviolet side |
|
(d) None of the above |
If V be the accelerating voltage, then the maximum frequency of continuous X-rays is given by
|
(a) |
(b) |
(c) |
(d) |
Assertion : The quantity L/R possesses dimensions of time.
Reason : To reduce the rate of increases of current through a solenoid should increase the time constant (L/R).
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Which of these is unipolar transistor
|
(a) Point contact transistor |
(b) Field effect transistor |
| (c) PNP transistor | (d) None of these |
In intrinsic semiconductor at room temperature, number of electrons and holes are
|
(a) Unequal |
(b) Equal |
(c) Infinite |
(d) Zero |