- ANichrome
- BCopper
- CSilver
- DManganin
Explanation:
Manganin is used to make standard resistors because
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Assertion : NOT gate is also called inverter circuit.
Reason : NOT gate inverts the input order.
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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. |
Resistances and
are joined in parallel and a current is passed so that the amount of heat liberated is
and
respectively. The ratio
has the value
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(a) |
(b) |
(c) |
(d) |
Assertion : The refractive index of diamond is
and that of liquid is
. If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is 30o.
Reason : μ =
where m is the refractive index of diamond with respect to liquid.
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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 assertion is false but reason is true. |
The radius of curvature for a convex lens is 40 cm, for each surface. Its refractive index is 1.5. The focal length will be
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(a) 40 cm |
(b) 20 cm |
(c) 80 cm |
(d) 30 cm |
Two capacitors C1 and C2 = 2C1 are connected in a circuit with a switch between them as shown in the figure. Initially the switch is open and C1 holds charge Q. The switch is closed. At steady state, the charge on each capacitor will be

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(a) Q, 2Q |
(b) Q/3, 2Q/3 |
(c) 3Q/2, 3Q |
(d) 2Q/3, 4Q/3 |
The phenomenon of change in the _____of light when it passes from one transparent medium to another is refraction.