The resultant capacitance of given circuit is
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(a) 3C |
(b) 2C |
(c) C |
(d) |
The resultant capacitance of given circuit is
|
(a) 3C |
(b) 2C |
(c) C |
(d) |
(a) 3C
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Which of the following is not a correct statement
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(a) Resistivity of electrolytes decreases on increasing temperature |
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(b) Resistance of mercury falls on decreasing its temperature |
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(c) When joined in series a 40 W bulb glows more than a 60 W bulb |
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(d) Resistance of 40 W bulb is less than the resistance of 60 W bulb |
The transformation ratio in the step-up transformer is
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(a) 1 |
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(b) Greater than one |
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(c) Less than one |
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(d) The ratio greater or less than one depends on the other factors |
The focal lengths of convex lens for red and blue light are 100 cm and 96.8 cm respectively. The dispersive power of material of lens is
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(a) 0.325 |
(b) 0.0325 |
(c) 0.98 |
(d) 0.968 |
Assertion : In practical application, power rating of resistance is not important.
Reason : Property of resistance remain same even at high temperature.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Two sources of waves are called coherent if
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(a) Both have the same amplitude of vibrations |
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(b) Both produce waves of the same wavelength |
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(c) Both produce waves of the same wavelength having constant phase difference |
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(d) Both produce waves having the same velocity |
When light travels from one medium into another it suffers:
In a moving coil galvanometer, the deflection of the coil θ is related to the electrical current i by the relation
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(a) i ∝ tanθ |
(b) i ∝ θ |
(c) i ∝ |
(d) i ∝ |