Question # 1

Number of electros emitted in photo electric effect depend upon.

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Intensity of incident light

Frequency of incident light

Energy of incident light

Wavelength of incident of light

Photo electrons are emitted y using visible light when the metal is.

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sodium

Copper

Nicked

Cobalt

De-Broglie waves are associated with

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Moving charged particles only

Moving neutral particles only

All moving particles

All parties whether in motion or at rest

The emission of electrons from metal surface when exposed to light is called:

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Compton effect

Pair production

Photoelectric effect

None of above

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

Which one of the following paved the way for modern physics

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Newtonian mechanics

Theory of relativity

Quantum theory

All of above

Eintein's Photoelectric equation is E_k= hf -∅ in this equation E₁, refers to:

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K.E of al the emited electrons

Mean K.E of emited electrons

Maximum K.E of emited electrons

Minimum K.E of emited electrons

In Compton effect the photon behaves as a.

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Wave

Particle

Nucleon

Both a and b

1 kg mass will be equivalent to energy.

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9 x 10⁸ J

9 X 10¹² J

9 X 10¹⁶ J

9 X 10¹⁹ J

Joule second is the unit of.

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Energy

Wein's constant

Planck's constant

Boyle's law

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Physics ICS Part 2 Chapter 19 Online MCQ's Test MCQs With Answers

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