# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 564 - 566 of 2320

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## 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

## Question number: 565

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MCQ▾

### Question

The force experienced by a pole of strength 100 Am at a distance of 0.2 m from a short magnet of length 5 cm and pole strength of 200 Am on its axial line will be

### Choices

Choice (4)Response

a.

5.0 x 10 -3 N

b.

2.5 x 10 -2 N

c.

2.5 x 10 -3 N

d.

5.0 x 10 -2 N

## Question number: 566

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MCQ▾

### Question

A proton is to circulate the earth along the equator with a speed of 1.0 x 10 7 m/s. The minimum magnetic field which should be created at the equator for this purpose. (The mass of proton = 1.7 x 10 -27 kg and radius of earth = 6.37 x 10 6 m) magnetic field will be (in Wb/m 2)

### Choices

Choice (4)Response

a.

2 x 10 -7

b.

1.6 x 10 -19

c.

1.0 x 10 -7

d.

1.67 x 10 -8

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