- Aisotones
- ✓isotopes
- Cisobars
- Disomers
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A potentiometer is an ideal device of measuring potential difference because
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(a) It uses a sensitive galvanometer |
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(b) It does not disturb the potential difference it measures |
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(c) It is an elaborate arrangement |
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(d) It has a long wire hence heat developed is quickly radiated |
The observed wavelength of light coming from a distant galaxy is found to be increased by 0.5% as compared with that coming from a terrestrial source. The galaxy is
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(a) Stationary with respect to the earth |
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(b) Approaching the earth with velocity of light |
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(c) Receding from the earth with the velocity of light |
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(d) Receding from the earth with a velocity equal to 1.5 |

The focal length of a lens of refractive index $\mu$ is f. If the lens is immersed in a liquid of refractive index $\mu$ then the focal length of lens is:
The power rating of an electric motor which draws a current of 3.75 amperes when operated at 200 V is about
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(a) 1 H.P. |
(b) 500 W |
(c) 54 W |
(d) 750 H.P. |
Two wires of same material have length L and 2L and cross–sectional areas 4A and A respectively. The ratio of their specific resistance would be
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(a) 1 : 2 |
(b) 8 : 1 |
(c) 1 : 8 |
(d) 1 : 1 |