A coil has an area of 0.05 m² and it has 800 turns. It is placed perpendicularly in a magnetic field of strength 4×10⁻⁵ Wb/m². It is rotated through 90⁰ in 0.1 sec. The avarage […]
In Young’s double slit experiment, for which colour the fringe width is the least
Options
(a) Red (b) Green (c) Blue (d) Yellow
Correct Answer:
Blue
Explanation:
No explanation available. Be the first […]
In a circuit, 5% of total current passes through a galvanometer. If resistance of the galvanometer is G, the value of the shunt is
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(a) 19 G (b) 20 G (c) G […]
At what distance from the centre of earth, the value of acceleration due to gravity will be half that on the surface (R=radius of earth)
Options
(a) 2 R (b) R (c) 1.414 […]
Water rises to a height h in a capillary at the surface of earth. On the surface of the moon the height of water column in the same capillary will be
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(a) […]
In a water fall, the water falls from a height of 100 m. If the entire kinetic energy of water is converted into heat, the rise in temperature of water will be
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A tuning fork gives 4 beats with 50 cm length of a sonometer. If the length of the wire is shortened by 1 cm, the number of beats is still the same. The frequency of […]
To what temperature should the hydrogen at room temperature (27°C) be heated at constant pressure so that the RMS velocity of its molecules becomes double of its previous value?
Options
(a) 1200° C […]
The wheel of a car is rotating at the rate of 1200 rev/min. On pressing the accelerator for 10 seconds, it starts rotating at 4500 rev/min. The angular acceleration of the wheel is
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A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4. If a force F of 2.5 newton is applied on the block, the frictional force between the block […]
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