# Dual Nature of Matter and Radiation-Einstein's Photoelectric Equation (NEET Physics): Questions 5 - 7 of 11

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## Question number: 5

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

Assertion-Reason▾

### Assertion (Ꭺ)

Mass of moving photon varies directly as the wavelength.

### Reason (Ꭱ)

Energy of the particle = Mass × (Speed of light) 2

### Choices

Choice (4) Response

a.

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

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

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

## Question number: 6

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

MCQ▾

### Question

Electrons are accelerated in television tubes through potential difference of about 10 KV

(1) The lowest wavelength of the emitted X-rays is 12.4A

(2) The lowest wavelength of the emitted X-rays is 1.24 A

(3) The highest frequency of the emitted X-rays is 2.4 × 10 8 Hz

(4) The highest frequency of the emitted X-rays is 2.4 × l0 18 Hz

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

### Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

## Question number: 7

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

Assertion-Reason▾

### Assertion (Ꭺ)

The de-Broglie wavelength of a molecule varies inversely as the square root of temperature.

### Reason (Ꭱ)

The root mean square velocity of the molecule is proportional to square root of absolute temperature.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

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