NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 698 - 702 of 2184

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Question number: 698

» Experimental Skills » Screw Gauge

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MCQ▾

Question

Two spheres of masses 2M and M are initially at rest at. Distance R apart. Due to mutual force of attraction, they approach each other. When they are at separation R/2, the acceleration of the center of mass of spheres would be

Choices

Choice (4) Response

a.

gm/s 2

b.

3 gm/s 2

c.

0 m/s 2

d.

12 gm/s 2

Question number: 699

» Electromagnetic Induction & Alternating Currents » Alternating Currents

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MCQ▾

Question

The instantaneous value of current in an A. C. circuit is . The current will be maximum for the first time at,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 700

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

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MCQ▾

Question

Two rail tracks, insulated from each other and the ground, are connected to milli voltmeter. What is the reading of the milli voltmeter when a train passes at a speed of 180 km/hr along the track? Given that - the horizontal component of earth’s magnetic field B H is 0.2 x 10 -4 Wb/m 2 and rails are separated by 1 meter.

Choices

Choice (4) Response

a.

1 V

b.

10 mV

c.

l mV

d.

100 mV

Question number: 701

» Laws of Motion » Force and Inertia

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MCQ▾

Question

In the above example, the velocity after 2 sec will be - (in m/sec)

Choices

Choice (4) Response

a.

10

b.

5

c.

10√3

d.

5√3

Question number: 702

» Experimental Skills » Screw Gauge

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MCQ▾

Question

Consider a system of two particles having mass m 1 and m 2. If the particle of mass m 1 is pushed towards the centre of mass of particles through a distance d, by what distance would be particle of mass m 2 move so as to keep the centre of mass of particles at the original position?

Choices

Choice (4) Response

a.

b.

c.

d

d.