If two inductors of inductances 3H and 6H are arranged in series; the total inductance is?
A. 9.0H B. 18.0H C. 0.5H D. 2.0H Correct Answer: Option A – 9.0H Explanation l =l1 + l2 = 3 + 6 = 9H
A force of 200N acts between two objects at a certain distance apart. The value of the force when the distance is halved is?
A. 400N B. 200N C. 100N D. 800N Correct Answer: Option D – 800N
The velocity of sound in air will be doubled if it’s absolute temperature is?
A. Quadrupled B. Constant C. Halved D. Doubled Correct Answer: Option A – Quadrupled
If the distance between two point charges its increased by a factor of four; the magnitude of the electrostatic force between them will be?
A. 1/4 of its former value B. 1/16 of its former value C. 1/2 of its former value D. 4 times its former value Correct Answer: Option B – 1/16 of its former value Explanation For the two-point charges, the magnitude of the electrostatic force between them is...
Two liquids L1 and L2 are contained in a U – tube. The height and the density of L1 are 8 cm and 10³ kgm−³ respectively. If the density of L2 is 800 kgm−³, its height measured from the same level is
A. 8 cm B. 10 cm C. 16 cm D. 12 cm Correct Answer: Option B = 10 cm Explanation Generally, from Hares Experiment, density is inversely proportional to height i.e h ∝1/d; → h1d1 = h2d2 ∴ 8 x 10³ = h2 x 800 ∴ h2 = 8 x 10³/800 =...Products
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