# Dual Nature of Matter and Radiation (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 6 - 10 of 39

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## Question number: 6

» Dual Nature of Matter and Radiation » De-Broglie Relation

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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: 7

» Dual Nature of Matter and Radiation » De-Broglie Relation

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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: 8

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

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MCQ▾

### Question

Ultraviolet light of wavelength 280 nm is used in an experiment on photo electric effect with lithium (Φ = 2.5 eV) cathode.

(1) The maximum kinetic energy is 1.9 eV

(2) The stopping potential is 1.9 V

(3) The maximum kinetic energy is 4.4 V

(4) The stopping potential is 4.4 eV

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

## Question number: 9

» Dual Nature of Matter and Radiation » Photoelectric Effect

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MCQ▾

### Question

Quantum nature of light is explained by which of the following phenomenon?

### Choices

Choice (4) Response

a.

Huygens wave theory

b.

Photoelectric effect

c.

Maxwell electromagnetic theory

d.

de- Broglie theory

## Question number: 10

» Dual Nature of Matter and Radiation » De-Broglie Relation

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MCQ▾

### Question

From rest an electron is accelerated between two such points which has potential 20 & 40 volts respectively. Associated de-Broglie wavelength of electron is-

### Choices

Choice (4) Response

a.

7.5 Å

b.

2.75 Å

c.

0.75 Å

d.

2.75 m

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