# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1176 - 1180 of 2320

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## Question number: 1176

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MCQ▾

### Question

A radio station is transmitting waves of wavelength 300 m. If diffracting power of transmitter is 10 kW, then numbers of photons diffracted per second is-

### Choices

Choice (4)Response

a.

1.5 × 10 33

b.

1.5 × 10 29

c.

1.5 × 10 31

d.

1.5 × 10 35

## Question number: 1177

» Properties of Solids & Liquids » Heat Transfer » Radiation

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MCQ▾

### Question

f between wavelength λ and λ + dλ, e λ and a λ be the emissive and absorptive powers of a body and E λ be the emissive power of a perfectly black body, then according to Kirchhoff’s law, which is true

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1178

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MCQ▾

### Question

The ratio of radii of two wires of same material is 2: 1. If these wires are stretched by equal forces, then the ratio of stresses produced in them will be

### Choices

Choice (4)Response

a.

4: 1

b.

1: 4

c.

1: 2

d.

2: 1

## Question number: 1179

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MCQ▾

### Question

In photoelectric effect if intensity of light is doubled then maximum kinetic energy of photoelectrons will become

### Choices

Choice (4)Response

a.

No change

b.

Four time

c.

Double

d.

Half

## Question number: 1180

» Properties of Solids & Liquids » Heat Transfer » Conduction

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MCQ▾

### Question

A cylindrical rod with one end in a steam chamber and it other end in ice results in melting of 0.3 gm of ice per second. If the rod is replaced by another with half the length and double the radius of the first and if the thermal conductivity of material of second rod is that of first, the rate at which ice melts in gm/sec will be

### Choices

Choice (4)Response

a.

0.1

b.

0.2

c.

3.2

d.

0.6

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