If what is the temperature of inversion
|
(a) - |
(b) + |
(c) - |
(d) + |
If what is the temperature of inversion
|
(a) - |
(b) + |
(c) - |
(d) + |
(a) -
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When a beam of light is used to determine the position of an object, the maximum accuracy is achieved if the light is
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(a) Polarised |
(b) Of longer wavelength |
|
(c) Of shorter wavelength |
(d) Of high intensity |
The reading of a high resistance voltmeter when a cell is connected across it is 2.2 V. When the terminals of the cell are also connected to a resistance of 5Ω the voltmeter reading drops to 1.8 V. Find the internal resistance of the cell
|
(a) 1.2 Ω |
(b) 1.3 Ω |
(c) 1.1 Ω |
(d) 1.4 Ω |

Four condensers are joined as shown in the adjoining figure. The capacity of each is 8 μF. The equivalent capacity between the points A and B will be

|
(a) 32 μF |
(b) 2 μF |
(c) 8 μF |
(d) 16 μF |
In an electroplating experiment, m gm of silver is deposited when 4 ampere of current flows for 2 minute. The amount (in gm) of silver deposited by 6 ampere of current for 40 second will be
|
(a) 4 m |
(b) m/2 |
(c) m/4 |
(d) 2 m |
Two electric lamps of 40 watt each are connected in parallel. The power consumed by the combination will be
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(a) 20 watt |
(b) 60 watt
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(c) 80 watt |
(d) 100 watt |
Velocity of light in glass whose refractive index with respect to air is 1.5 is 2 × 108 m/s and in certain liquid the velocity of light found to be 2.5 × 108 m/s. The refractive index of the liquid with respect to air is
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(a) 0.64 |
(b) 0.80 |
(c) 1.20 |
(d) 1.44 |