Explanation:
The angle between magnetic field and area vector is 90°, so the flux associated with coil is zero. Although magnetic field is changing but flux is remaining constant equal to zero, so emf induced and hence current in the loop is equal to zero.
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Which of the following rays has the maximum frequency
|
(a) Gamma rays |
(b) Blue light |
(c) Infrared rays |
(d) Ultraviolet rays |
What is the area of the plates of a 3F parallel plate capacitor, if the separation between the plates is 5mm
|
(a) 1.694 |
(b) 4.529 |
(c) 9.281 |
(d) 12.981 |
The spectrum of radiation 1.0 
is in the infrared region. The energy of one photon of this in joules will be
|
(a) 6.62 |
(b) 6.62 |
(c) |
(d) 3 |
Function of rectifier is
|
(a) To convert ac into dc |
(b) To convert dc into ac |
|
(c) Both (a) and (b) |
(d) None of these |
For a photoelectric cell the graph showing the variation of cut of voltage (Vo) with frequency (n) of incident light is best represented by
|
(a)
|
(b)
|
(c)
|
(d)
|
