NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2146 - 2148 of 2184

Access detailed explanations (illustrated with images and videos) to 2184 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

Question number: 2146

» Electrostatics » Electric Field

Edit
MCQ▾

Question

Consider a uniform electric field in the Z direction. The potential is a constant

Choices

Choice (4) Response

a.

for any y for a given z.

b.

for any x for a given z.

c.

on the x-y plane for a given z.

d.

All a. , b. and c. are correct

Question number: 2147

» Physics and Measurement » Technology and Society

Edit
MCQ▾

Question

Consider a wire carrying a steady current, placed in a uniform magnetic field perpendicular to its length. Consider the charges inside the wire. It is known that magnetic forces do no work. This implies that,

Choices

Choice (4) Response

a.

Some charges inside the wire move to the surface as a result of .

b.

If the wire moves under the influence of , no work is done by the magnetic force on the ions, assumed fixed within the wire.

c.

If the wire moves under the influence of , no work is done by the force.

d.

Both a. and b. are correct

Question number: 2148

» Physics and Measurement » Technology and Society

Edit
MCQ▾

Question

A cubical region of space is filled with some uniform electric and magnetic fields. An electron enters the cube across one of its faces with velocity and a positron enters via opposite face with velocity . At this instant,

Choices

Choice (4) Response

a.

The magnetic forces on both the particles cause equal accelerations.

b.

Particles gain or loose energy at the same rate.

c.

The motion of the center of mass (CM) is determined by alone.

d.

All c. , a. and b. are correct