Current provided by a battery is maximum when
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(a) Internal resistance equal to external resistance |
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(b) Internal resistance is greater than external resistance |
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(c) Internal resistance is less than external resistance |
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(d) None of these |
(a) Internal resistance equal to external resistance
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Which of the following is incorrect statement regarding photon
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(a) Photon exerts no pressure |
(b) Photon energy is hv |
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(c) Photon rest mass is zero |
(d) None of these |
The focal length of a normal eye-lens is about:
A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointing in the same direction
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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 electron velocity will increase in magnitude |
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(d) The electron velocity will decrease in magnitude |
In a PN-junction diode
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(a) The current in the reverse biased condition is generally very small |
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(b) The current in the reverse biased condition is small but the forward biased current is independent of the bias voltage |
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(c) The reverse biased current is strongly dependent on the applied bias voltage |
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(d) The forward biased current is very small in comparison to reverse biased current |
An object 5 cm tall is placed 1m from a concave spherical mirror which has a radius of curvature of 20 cm The size of the image is
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(a) 0.11 cm |
(b) 0.50 cm |
(c) 0.55 cm |
(d) 0.60 cm |