Gravitation MCQ for NEET

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Gravitation MCQ for NEET. We covered all the Gravitation MCQ for NEET in this post for free so that you can practice well for the exam.

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MCQ on Gravitation for NEET Students

If an increase in length of metal wire is 0.2% due to stretching, the percentage increase in its resistance will be

(A) 0.5%

(B) 0.2%

(C) 0.8%

(D) 2%

Option c – 0.8%

A beam of light of wavelength 500 nm falls on a slit 1 mm wide and the resulting single diffraction pattern is observed on a screen. The distance between the first 160 cm away. fringes on either side of the central bright dark fringe are

(A) 2.4 cm

(B) 2.4 mm

(C) 1.6 cm

(D) 1.6 mm

Option d – 1.6 mm

A long horizontally fixed wire carries a current of 60 A. Directly above and parallel to it is another wire that carries a current of 20 A and 0.04 N/m. The distance between the weights of two wires for which the upper wire is just supported by magnetic repulsion is

(A) 4 mm

(B) 2.5 cm

(C) 6 mm

(D) 8 cm

Option c – 6 mm

An open pipe is suddenly closed at one end with the result that the frequency of the fifth harmonic of the closed pipe is found to be higher by 100 Hz, than the fundamental frequency of the open pipe. The fundamental frequency of the open pipe is nearly

(A) 67 Hz

(B) 89.1 Hz

(C) 102 Hz

(D) 117 Hz

Option a – 67 Hz

A coil has a self-inductance of 20 mH. What is the maximum magnitude of the induced emf in the inductor, when a current I = 0.2 sin 20 t ampere is sent through it?

(A) 1.2 V

(B) 0.6 V

(C) 0.2 V

(D) 0.08 V

Option d – 0.08 V

4 L of water at an initial temperature of 30 °C is heated by a heater of power 1 kW. If the lid of the kettle is opened, then heat is lost at the constant rate of 160 J/s. Find the time required to raise the temperature of water to 50 °C with the lid open (specific heat of water 4.2 kJ/kg).

(A) 5 min 40 s

(B) 4 min 20 s

(C) 8 min 20 s

(D) 6 min 40 s

Option d – 6 min 40 s

A certain mass of hydrogen is changed to helium by the process of fusion. The mass defect in the fusion reaction is 0.02866 u. The energy liberated per u is (given 1 u = 931 MeV)

(A) 2.67 MeV

(B) 26.7 MeV

(C) 6.675 MeV

(D) 13.35 MeV

Option c – 6.675 MeV

A short bar magnet is placed with its north pole pointing north. The neutral point is 20 cm away from the center of the magnet. If the earth’s magnetic field equals 0.4 x 10 T, the magnetic moment of the magnet is

(A) 6.3 A-m²

(B) 3.2 A-m²

(C) 0.5 A-m²

(D) 1.5 A-m²

Option b – 3.2 A-m²

A truck is moving in a circular horizontal track of radius 25 m with a constant speed of 15 m/s. A plump bob is suspended from the roof of the truck by a light rigid rod of length 80 cm. The angle made by the rod with the track is Take g = 10 m/s²

(A) 42°

(B) 54°

(C) 45°

(D) 68°

Option a – 42°

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the spring of half-length, the line OA will ……….

(A) the shift towards F-axis

(B) shift towards X-axis

(C) remains as it is

(D) become double in length

Option a – the shift towards F-axis

The rate of emission of electrons is directly proportional to the intensity of incident light when

(A) the frequency of incident radiation is kept constant.

(B) work function is high.

(C) incident frequency and surface upon which it is incident is kept constant.

(D) stopping potential is maximum.

Option c – incident frequency and surface upon which it is incident is kept constant.

In a meter bridge experiment, the null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X<Y, then where will be the new position of the null point from the same end, if one decides to balance a resistance of 4X against Y?

(A) 50 cm

(B) 80 cm

(C) 40 cm

(D) 70 cm

Option a – 50 cm

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