A choke is preferred to a resistance for limiting current in AC circuit because
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(a) Choke is cheap (b) There is no wastage of power (c) Choke is compact in size (d) […]
A monoatomic gas is suddenly compressed to (1/8)th of its initial volume adiabatically. The ratio of its final pressure to the initial pressure is (given the ratio of the specific heat of the given gas […]
A gaussian sphere encloses an electric dipole within it. The total flux across the sphere is
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(a) zero (b) half that due to a single charge (c) double that due to a […]
A satellite in a circular orbit of radius R has a period of 4 hours. Another satellite with orbital radius 3R around the same planet will have a period (in hours)
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(a) […]
A galvanometer coil has a resistance of 15 ohm and gives full scale deflection for a current of 4 mA. To convert it to an ammeter of range 0 to 6 A,
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A comb run through one’s dry hair attracts small bits of paper. This is due to
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(a) comb is good conductor (b) paper is good conductor (c) atoms in paper gets polarised […]
When the length of the vibrating segment of a sonometer wire is increased by 1%, the percentage change in its frequency is
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(a) 100 / 101 (b) 99 / 100 (c) 1 […]
An unpolarised beam of intensity I is incident on a pair of nicols making an angle of 60° with each other. The intensity of light emerging from the pair is
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(a) I […]
A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is
Chloroplasts without grana are known to occur in
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(a) bundle sheath cells of C₃ plants (b) mesophyl cells of C₄ plants (c) bundle sheath cells of C₄ plants (d) mesophyl cells of […]
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