NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2156 - 2158 of 2184

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Question number: 2156

» Electrostatics » Electric Field Lines

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MCQ▾

Question

Figure shows electric field lines in which an electric dipole p is placed as shown. Which of the following statements is correct?

Figure shows electric field lines

Figure Shows Electric Field Lines

Figure shows electric field lines

Choices

Choice (4) Response

a.

The dipole will experience a force upwards.

b.

The dipole will not experience any force.

c.

The dipole will experience a force towards left.

d.

The dipole will experience a force towards right.

Question number: 2157

» Electrostatics » Electric Field

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Question

A positive charge is uniformly distributed along a circular ring of radius . A small test charge is placed at the center of the ring (Fig. ). Then

Image of The center of the ring

Image of the Center of the Ring

Image of The center of the ring

Choices

Choice (4) Response

a.

If and is displaced away from the centre in the plane of the ring, it will be pushed back towards the centre.

AND

If and is displaced away from the centre in the plane of the ring, it will never return to the centre and will continue moving till it hits the ring.

b.

If , it will perform SHM for small displacement along the axis.

c.

at the centre of the ring is in an unstable equilibrium within the plane of the ring for .

d.

All a. , b. and c. are correct

Question number: 2158

» Physics and Measurement » Technology and Society

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MCQ▾

Question

Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field

Choices

Choice (4) Response

a.

They have equal components of momenta.

b.

They must have equal charges.

c.

The charge to mass ratio satisfy:

d.

They necessarily represent a particle-antiparticle pair.