# Dual Nature of Matter and Radiation (BITSAT Physics): Questions 1 - 5 of 6

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## Question number: 1

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

### Question

The magnitude of saturation photoelectric current depends upon –

### Choices

Choice (4) Response

a.

Work function

b.

Stopping potential

c.

Intensity

d.

Frequency

## Question number: 2

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

### Question

For photoelectric emission, tungsten requires light of , if light of wavelength is incident, then emission –

### Choices

Choice (4) Response

a.

Takes place

b.

Don’t take place

c.

Depends on frequency

d.

May or may not take place

## Question number: 3

» Dual Nature of Matter and Radiation » Dual Nature of Radiation

MCQ▾

### Question

A body radiated energy at a temperature of . If the temperature is increased to , then it radiates energy at the rate of –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 4

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

MCQ▾

### Question

The de Broglie wavelength of a neutron when its kinetic energy is , is . What will be its wavelength when its kinetic energy is ?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 5

» Dual Nature of Matter and Radiation » Dual Nature of Radiation

MCQ▾

### Question

The maximum energy in the thermal radiation from a heat source occurs at a wavelength of . According to Wein’s displacement law, the temperature of this source will be times. The temperature of another source for which the wavelength at maximum energy is . Then the value of is –

### Choices

Choice (4) Response

a.

2

b.

c.

4

d.

1

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