# NEET (NTA-National Eligibility cum Medical Entrance Test) Physics: Questions 678 - 682 of 2142

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## Question number: 678

Assertion-Reason▾

### Assertion (Ꭺ)

If an electron, while coming vertically from outer space, enters the earth’s magnetic field, it is deflected towards west.

### Reason (Ꭱ)

Electron has negative charge.

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

## Passage

Read the passage given below and answer the questions that follows:

A charge particles q enters in a magnetic field with the velocity . Neglect any force other than magnetic force. Now answer the following question.

## Question number: 679 (1 of 3 Based on Passage) Show Passage

MCQ▾

### Question

When particle arrives at any point P (2, 2) then force acting on it, will be -

### Choices

Choice (4) Response

a.

Zero

b.

c.

8q

d.

2

## Question number: 680 (2 of 3 Based on Passage) Show Passage

MCQ▾

### Question

Magnetic force F acting on charge is proportional to –

### Choices

Choice (4) Response

a.

b.

c.

F does not depend on x or y co-ordinate

d.

## Question number: 681 (3 of 3 Based on Passage) Show Passage

MCQ▾

### Question

Which of the following is true for the direction of magnetic force?

### Choices

Choice (4) Response

a.

If x > y then force works along (-z) direction

b.

If x < y then force works along (+z) direction

c.

If x > y then force works along (+z) direction

d.

None

## Question number: 682

MCQ▾

### Question

A magnet of moment M is lying in a magnetic field of induction B. W 1 is the work done in turning it from 0° to 60° and W 2 is the work done in turning it from 30° to 90°.

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page