# NEET Physics: Questions 403 - 406 of 2142

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## Question number: 403

MCQ▾

### Question

Identical point charges, each having +q charge, are fixed at each of the points x = x 0, x = 3x 0, x = 5x 0 ……… infinite, on the x-axis and an identical point charges, each having -q charge, are fixed at each of the points x = 2x 0, x = 4x 0, x = 6x 0 ……. infinite. Here x 0 is a positive constant. Potential at the origin due to the above system of charges is,

### Choices

Choice (4) Response

a.

b.

c.

d.

0

## Question number: 404

MCQ▾

### Question

A ship is steaming towards east at a speed of 12 ms -1. A woman runs across the deck at a speed of 5 ms -1 in the direction at right angles to the direction of motion of the ship i. e. towards north. What is the velocity of the woman relative to sea?

### Choices

Choice (4) Response

a.

12 m/s

b.

5 m/s

c.

13 m/s

d.

17 m/s

## Question number: 405

MCQ▾

### Question

A wheel having moment of inertia 2 kg -m 2 about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque which can stop the wheel’s rotation in 1 minute would be

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 406

MCQ▾

### Question

How much kinetic energy will be gained by an α- particle in going from a point at 70V to another point at 50V?

### Choices

Choice (4) Response

a.

40 MeV

b.

40 keV

c.

40 eV

d.

0 eV

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