# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 561 - 564 of 2184

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## Question number: 561

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MCQ▾

### Question

proton of energy 8eV is moving in a circular path in a uniform magnetic field. The energy of an α-particle moving in the same magnetic field and along the same path will be-

### Choices

Choice (4) Response

a.

6eV

b.

8eV

c.

4eV

d.

2eV

## Question number: 562

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MCQ▾

### Question

In ballistic galvanometer, the frame on which the coil is wound is non-metallic. It is

### Choices

Choice (4) Response

a.

To avoid the production of induced emf

b.

To avoid the production of eddy currents

c.

To increase the production of induced emf

d.

To increase the production of eddy currents

## Question number: 563

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MCQ▾

### Question

Which of the following is/are not the main difference between electric lines of force and magnetic lines of force?

(1) Electric lines of force are closed curves whereas magnetic lines of force are open curves.

(2) Magnetic lines of force cut each other whereas electric lines of force do not cut.

(3) Electric lines of force cut each other whereas magnetic lines of force do not cut.

(4) Electric lines of force are open curves whereas magnetic lines of force are closed curves.

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1 and 2 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 3 are correct

## Question number: 564

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MCQ▾

### Question

A beam of protons enters a uniform magnetic field of 0.3 tesla with a velocity of 4 x 10 5 m/s at an angle of 60° to the field. Then, (Mass of the proton = 1.7 x 10 -27 kg. )

(1) The radius of the helical path is 1.226 x 10 -2 m

(2) The pitch of the helix is 4.45 x 10 -2 m

(3) The radius of the helical path is 1.226 x 10 -3 m

(4) The pitch of the helix is 4.45 x 10 -4 m

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1 and 2 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 3 are correct