AIPMT 2008 | Dual Nature of Radiation and Matter Question 56 | Physics

AIPMT 2008

MCQ (Single Correct Answer)

-1

In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of

collisions between the charged particles emitted from the cathode and the atoms of the gas

collision between different electrons of the atoms of the gas

excitation of electrons in the atoms

collision between the atoms of the gas

AIPMT 2008

MCQ (Single Correct Answer)

-1

The work function of a surface of a photosensitive material is 6.2 eV. The wavelength of the incident radiation for which the stopping potential is 5 V lies in the

infrared region

X-ray region

Ultraviolet region

Visible region

AIPMT 2008

MCQ (Single Correct Answer)

-1

A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 $$ \times $$ 10⁶ m s^$$-$$1. The velocity of the particle is

3 $$ \times $$ 10^$$-$$31 ms^$$-$$1

$$2.7 \times {10^{ - 21}}\,m{s^{ - 1}}$$

2.7 $$ \times $$ 10^$$-$$18 ms^$$-$$1

9 $$ \times $$ 10^$$-$$2 ms^$$-$$1

AIPMT 2007

MCQ (Single Correct Answer)

-1

Monochromatic light of frequency 6.0 $$ \times $$ 10¹⁴ Hz is produced by a laser. The power emitted is 2 $$ \times $$ 10^$$-$$3 W. The number of photons emitted, on the average, by the source per second is

5 $$ \times {10^{16}}$$

5 $$ \times {10^{17}}$$

5 $$ \times {10^{14}}$$

5 $$ \times {10^{15}}$$

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