Physics
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May 23, 2022
The magnitudes of the gravitational force at distances r1 and r2 from the centre of a uniform sphere of radius R...
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May 23, 2022
Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period...
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May 23, 2022
A rubber cord catapult has cross-sectional area 25mm2 and initial length of rubber cord is It is stretched to and...
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May 23, 2022
Two wires A and B are of same materials. Their lengths are in the ratio 1 : 2 and diameters...
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May 23, 2022
(a) (2Gm/r)1/2≤c (b) (2Gm/r)1/2=c (c) (2Gm/r)1/2≥c (d) (gm/r)1/2≥c Answer: c (7)
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May 23, 2022
Two satellite are revolving around the earth with velocities v1 and v2 and in radii r1 and r2 (r1 >...
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May 23, 2022
The area of cross section of a steel wire (Y=2.0×1011 N/m2) is 0.1 cm2 . The force required to double its...
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May 23, 2022
(a) Length of the wire (b) Radius of the wire (c) Material of the wire (d) Shape of the cross...
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May 23, 2022
(a) Square of the distance of the milky way from the earth (b) Distance of milky way from the earth...
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May 23, 2022
If orbital velocity of planet is given by v =Ga Mb Rc , then (a) a=1/3,b=1/3,c=-1/3 (b) a=1/2,b=1/2,c=-1/2 (c) a=1/2,b=-1/2,c=-1/2...
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May 23, 2022
(a) 4π2 R3 G-1T-2 (b) 8π2 R3 G-1T-2 (c) 12π2 R3 G-1T-2 (d) 16π2...
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May 23, 2022
(a) 2.507 (b) 1.033 (c) ...
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May 23, 2022
Two circular discs A and B are of equal masses and thickness but made of metals with densities dA and...
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May 23, 2022
The moment of inertia of a solid sphere of density ρ and radius R about its diameter is (a) (105/176)R5ρ (b) ...
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May 23, 2022
(a) 29√2 days (b) 29 /√2 days (c) 29 × 2 days (d) 29 days Answer: d (5)
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May 23, 2022
(a) 1/3 (b) 1/9 (c) 1/27 (d) 1/4 Answer; b (7)
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May 23, 2022
The maximum and minimum distances of a comet from the sun are 8 × 1012 m and 1.6 × 1012...
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May 23, 2022
(a) Sliding of molecular layer is much easier than compression or expansion (b) Reciprocal of bulk modulus of elasticity is...
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May 23, 2022
The angular velocity of a body is →w= 2^j+3^k+4^k and a torque →τ = ^j+2^k+3^k acts on it. The rotational...
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May 23, 2022
(a) Disc (b) Ring (c) Solid sphere (d) All will make same number of rotations Ans. d (16)
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May 23, 2022
(a) 400% (b) 800% (c) 200% (d) 100% Ans. b (15)
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May 23, 2022
(a) Length (b) Breadth (c) Shape (d) Volume Answer-c (6)
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May 23, 2022
A wheel is rotating with an angular speed of 20 rad/s . It is stopped to rest by applying a...
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May 23, 2022
A rod of length l and radius r is joined to a rod of length l/2 and radius r/2 of...
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May 23, 2022
(a) √4 : √3 (b)√3: √4 (c) √3:√2 (d) √2:√3 Ans. a (6)
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May 23, 2022
(a) 0.002 (b) 0.004 (c) 0.008 ...
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May 23, 2022
(a) Total Energy (b) K.E. (c) Angular Velocity (d) Linear Momentum Answer: a (11)
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May 23, 2022
(a) Potential energy (b) Kinetic energ (c) Linear momentum (d) Angular momentum Answer:D (11)
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May 23, 2022
(a) Keplers law of areas still holds (b) Keplers law of period still holds (c) Keplers law of areas and...
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May 23, 2022
(a) Tangential velocity is constant (b) Angular velocity is constant (c) Radial velocity is constant (d) Areal velocity is constant...
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May 23, 2022
(a) Work energy theorem (b) Conservation of linear momentum (c) Conservation of angular momentum (d) Conservation of energy Answer: c...
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May 23, 2022
(a) 1.38 (b) 1.383/2 (c) 1.381/2 ...
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May 23, 2022
(a) T2 ∞ R3 (b) T3 ∞ R2 (c) T2 ∞ (1/R3 ) ...
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May 23, 2022
(a) 16 L (b) 64 L (c) L/4 ...
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May 23, 2022
(a) 4.2 years (b) 2.8 years (c) 5.6 years (d) 8.4 years Answer: b (9)
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May 23, 2022
(a) A (b) B (c) C (d) D Answer: c (14)
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May 23, 2022
(a) The time taken in travelling DAB is less than that for BCD (b) The time taken in travelling DAB...