# NEET Physics: Questions 1015 - 1019 of 2142

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## Question number: 1015

MCQ▾

### Question

If E and B be the electric and magnetic field of E. M. wave then the direction of propagation of E. M. wave is along the direction.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1016

MCQ▾

### Question

In an ac circuit, V and I are given by ,

. The average power dissipated in circuit is

### Choices

Choice (4) Response

a.

2.5 watt

b.

10 4 watt

c.

10 watt

d.

0.025 watt

## Question number: 1017

MCQ▾

### Question

Light from a sodium lamp (λ 0 = 589 nm) passes through a tank of glycerin (refractive index 1.47) 20 m long in a time t 1. If it takes a time to traverse the same tank when filled with carbon disulphide (index 1.63), then the difference t 2 - t 1 is,

### Choices

Choice (4) Response

a.

6.67 × 10 -8 sec

b.

2.07 × 10 -7 sec

c.

1.09 × 10 -7 sec

d.

1.07 × 10 -8 sec

## Question number: 1018

MCQ▾

### Question

Electromagnetic waves travel in a medium with a speed of 2 x 10 8 m/s. The relative permeability of the medium is 1. What is the relative permittivity of the medium?

### Choices

Choice (4) Response

a.

-0.25

b.

2.25

c.

3.25

d.

1.25

## Question number: 1019

Assertion-Reason▾

### Assertion (Ꭺ)

By increasing the diameter of the objective of telescope, we can increase its range.

### Reason (Ꭱ)

The range of a telescope tells us how far away a star of some standard brightness can be spotted by telescope.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

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

d.

Both Ꭺ and Ꭱ are false

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