- a upward.
- (g - a) upward.
- (g - a) downward.
- g downward.
Explanation:
Gravity is the only force acting on the stone when it is released. And, we know that gravity is always in the downward direction.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion : Diamond glitters brilliantly.
Reason : Diamond does not absorb sunlight.
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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. |
The hottest planet of solar system is
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(a) Mars |
(b) Mercury |
(c) Venus |
(d) Pluto |
Work done in moving a positive charge on an equipotential surface is
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(a) Finite, positive but not zero |
(b) Finite, negative but not zero |
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(c) Zero |
(d) Infinite |

Pick out the wrong statement
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(a) In a simple battery circuit, the point of lowest potential is the negative terminal of the battery |
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(b) The resistance of an incandescent lamp is greater when the lamp is switched off |
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(c) An ordinary 100 W lamp has less resistance than a 60 W lamp |
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(d) At constant voltage, the heat developed in a uniform wire varies inversely as the length of the wire used |
The e.m.f. of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of 2 Ω is connected as a shunt with the cell, the balance point is obtained at 100 cm. The internal resistance of the cell is
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(a) 0.1 Ω |
(b) 1 Ω |
(c) 2 Ω |
(d) 0.5 Ω |
Referring to the figure below, the effective resistance of the network is
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(a) 2 r |
(b) 4 r |
(c) 10 r |
(d) 5r/2 |
Young’s double slit experiment is performed with light of wavelength 550 nm. The separation between the slits is 1.10 mm and screen is placed at distance of 1 m. What is the distance between the consecutive bright or dark fringes
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(a) 1.5 mm |
(b) 1.0 mm |
(c) 0.5 mm |
(d) None of these |
In the circuit shown P ≠ R, the reading of the galvanometer is same with switch S open or closed. Then
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(a) |
(b) |
(c) |
(d) |