Physics · JEE

Important Questions: Einstein's photoelectric equation, particle nature of light for JEE

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The most important Einstein's photoelectric equation, particle nature of light questions for JEE cover conceptual traps, standard results, and numerical patterns from Einstein's photoelectric equation, particle nature of light. Goodmarks provides 4+ high-yield MCQs with full solutions.

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Syllabus context

Part of Dual Nature of Matter and Radiation in JEE Main Physics.

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Q1PhysicsUnit 17: Dual Nature of Matter and Radiation

Fill in the blanks: The

\ldots

tungsten is reduced by coating with barium oxide.

Q2PhysicsUnit 17: Dual Nature of Matter and Radiation

Threshold wavelength of tungsten is 2300 angstrom. If ultraviolet light of wavelength 1800 angstrom is incident on it, then the maximum kinetic energy of photoelectrons would be?

Q3PhysicsUnit 17: Dual Nature of Matter and Radiation

Light of two different frequencies whose protons have energies

1 e V

and

2.5 e V

respectively, successively illuminate a metallic surface whose work function is

0.5 e V .

Ratio of maximum speeds of emitted electrons will be

Q4PhysicsUnit 17: Dual Nature of Matter and Radiation

The surface of some material is radiated in turn by waves of

\lambda=3.5 \times

10^{-7}

and

\lambda=5.4 \times 10^{-7} m

respectively The ratio of the stopping potential in the two cases in

2: 1 .

The work function of the metal is:

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Key areas include Einstein's photoelectric equation, particle nature of light. Prioritise these before moving to edge cases.

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