Which of the following figures correctly shows the phase relation between the input signal and the output signal of triode amplifier
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(a)
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(b)
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(c)
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(d)
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(a)
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In the circuit shown in figure, the heat produced in 5 ohm resistance is 10 calories per second. The heat produced in 4 resistance is
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(a) 1 cal / sec |
(b) 2 cal/sec |
(c) 3 cal / sec |
(d) 4 cal/sec |
Heat produced in a wire of resistance R due to current flowing at constant potential difference is proportional to
|
(a) |
(b) |
(c) R |
(d) |
A current of 16 ampere flows through molten NaCl for 10 minute. The amount of metallic sodium that appears at the negative electrode would be
|
(a) 0.23 gm |
(b) 1.15 gm |
(c) 2.3 gm |
(d) 11.5 gm |
The output of a NAND gate is 0
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(a) If both inputs are 0 |
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(b) If one input is 0 and the other input is 1 |
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(c) If both inputs are 1 |
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(d) Either if both inputs are 1 or if one of the inputs is 1 and the other 0 |
When a current of 1 ampere is passed through a conductor whose ends are maintained at temperature difference of 1 ℃, the amount of heat evolved or absorbed is called
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(a) Peltier coefficient |
(b) Thomson coefficient |
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(c) Thermoelectic power |
(d) Thermo e.m.f. |
The focal length of a convex mirror is 20 cm its radius of curvature will be
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(a) 10 cm |
(b) 20 cm |
(c) 30 cm |
(d) 40 cm |
The correct order of ionizing capacity of α, β and γ - rays is
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(a) α > γ > β |
(b) α > β > γ |
(c) α < β <γ |
(d) α > β > γ |
The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of 90° about its perpendicular axis, the electric field at the same point will be
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(a) E |
(b) E/4 |
(c) E/2 |
(d) 2E |
