Three resistors each of 2 ohm are connected together in a triangular shape. The resistance between any two vertices will be
|
(a) 4/3 ohm |
(b) 3/4 ohm |
(c) 3 ohm |
(d) 6 ohm |
(a) 4/3 ohm
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Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is
|
(a) 24 ohm |
(b) 16 ohm |
(c) |
(d) |
The optical path of a monochromatic light is same if it goes through 4.0 cm of glass or 4.5 cm of water. If the refractive index of glass is 1.53, the refractive index of the water is
|
(a) 1.30 |
(b) 1.36 |
(c) 1.42 |
(d) 1.46 |
Which one of the following is true in photoelectric emission
|
(a) Photoelectric current is directly proportional to the amplitude of light of a given frequency |
|
(b) Photoelectric current is directly proportional to the intensity of light of a given frequency at moderate intensities |
|
(c) Above the threshold frequency, the maximum K.E. of photoelectrons is inversely proportional to the frequency of incident light |
|
(d) The threshold frequency depends upon the wavelength of incident light |
$\frac{1}{8}$
$\frac{1}{4}$
$4$
$8$
