Kumar Mittal Solutions for Exercise 1: QUESTIONS

Author:Kumar Mittal

Kumar Mittal Physics Solutions for Exercise - Kumar Mittal Solutions for Exercise 1: QUESTIONS

Attempt the free practice questions from Exercise 1: QUESTIONS with hints and solutions to strengthen your understanding. ISC Physics Class 12, Part-2 solutions are prepared by Experienced Embibe Experts.

Questions from Kumar Mittal Solutions for Exercise 1: QUESTIONS with Hints & Solutions

HARD
12th ICSE
IMPORTANT

A retarding potential of 0.5 V is required to block the movement of electrons from the cathode of a photoelectric cell when violet light of wavelength 4000 Ao strikes its surface. Find the threshold frequency.

EASY
12th ICSE
IMPORTANT

A retarding potential of 0.5 V is required to block the movement of electrons from the cathode of a photoelectric cell when violet light of wavelength 4000 Ao strikes its surface. Find the energy light of wavelength 3000 Ao.

HARD
12th ICSE
IMPORTANT

A retarding potential of 0.5 V is required to block the movement of electrons from the cathode of a photoelectric cell when violet light of wavelength 4000 Ao strikes its surface. Find the maximum energy of the electron emitted from the cathode surface when 3000 Ao light strikes it.

HARD
12th ICSE
IMPORTANT

Find the frequency of light which ejects from a metal surface electrons which are fully stopped by a retarding potential of 3 V. The photoelectric effect starts in this metal at a frequency of  6×1014 s-1h=6.63×10-34 Js, e=1.6×10-19 C.

HARD
12th ICSE
IMPORTANT

Ultraviolet light of wavelength 800 Ao and 700 Ao, when allowed to fall on hydrogen atoms in their ground state, is found to liberate electrons with kinetic energies 1.8 eV and 4.0 eV respectively. Find the value of Planck's cosntant.

MEDIUM
12th ICSE
IMPORTANT

In an experiment of photoelectric effect, the graph of maximum kinetic energy Ek of the emitted photoelectrons versus the frequency v of the incident light is a straight line shown in the figure. Calculate threshold frequency.

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MEDIUM
12th ICSE
IMPORTANT

In an experiment of photoelectric effect, the graph of maximum kinetic energy Ek of the emitted photoelectrons versus the frequency v of the incident light is a straight line shown in the figure. Calculate work function W of cathode-metal in eV.

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HARD
12th ICSE
IMPORTANT

In an experiment of photoelectric effect, the graph of maximum kinetic energy Ek of the emitted photoelectrons versus the frequency v of the incident light is a straight line shown in the figure. Calculate stopping potential for the electrons emitted by light of frequency v=30×1014 s-1.

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