Physics General Science Test Hard Mode

Sr. #	Questions	Answers Choice
1	Ultra-violet radiation of 6.2 eV falls on an aluminium surface K.E of fastest electrons emitted is(work function = 4.2 eV)	3.2 x 10-21 J 3.2 x 10-19 J 7 x 10-25 J 9 x 10-32 J
2	The frequency of the incident light falling on a photosensitive metal plate is doubled the kinetic energy of the emitted photoelectrons is	Double the earlier value Unchanged More than doubled Less than doubled
3	A monochromatic source of light is placed at a large distance d from a metal surface Photoelectrons are ejected at rate n,kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly	2n and 2E 4n and 4e 4n and E N and 4E
4	A photocell with a constant p.d of V volt across it illuminated by a point source from a distance of 25 cm. When the source is moved to a distance of 1 m, the electrons emitted by the photocell	Carry 1/4th their previous energy Are 1/6th as numerous as before Are 1/4th as numerous as before Carry 1/4th their previous momentum
5	Radio waves of constant amplitude can be generated with	Rectifier Filter FET Oscillator

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