Question
The work function of three metals $A , B$ and C are $1.92 eV , 2 eV , 5 eV$ respectively. On the basis of Einstein equation, when radiation of wavelength 4100 Å is used, the emission of electrons will be :
✓
Answer
(C) - Only from metal A and B
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An electron moves along the line$ AB,$ which lies in the same plane as a circular loop of conducting wires as shown in the diagram. What will be the direction of current induced if any, in the loop
→In the adjoining circuit, the e.m.f. of the cell is $2$ volt and the internal resistance is negligible. The resistance of the voltmeter is $80$ ohm. The reading of the voltmeter will be
→When the reflecting or refracting rays do not actually intersect but appear to intersect when produced backwards,
An object is immersed in a fluid. In order that the object becomes invisible, it should(a) Behave as a perfect reflector(b) Absorb all light falling on it(c) Have refractive index one(d) Have refractive index exactly matching with that of the surrounding fluid
Which of the following is not a mode of radioactive decay?
To reduce the reasonant frequency in an LCR series circuit with a generator:
In image formation from spherical mirrors, only paraxial rays are considered because they:
Before using the tangent galvanometer, its coil is set in
In a PN-junction(a) P and N both are at same potential(b) High potential at N side and low potential at P side(c) High potential at P side and low potential at N side(d) Low potential at N side and zero potential at P side
In a semiconductor(a) There are no free electrons at any temperature(b) The number of free electrons is more than that in a conductor(c) There are no free electrons at 0 K(d) None of these