Page 2 - worksheet-2 on Dual Nature of light

(a) va = vb and Ia ≠ Ib
(b) va = vc and Ia = Ic
(c) va = vb and Ia = Ib
(d) vb = vc and Ib = Ic
7 Einstein’s photoelectric equation is:

8 Two particles A1 and A2 of masses m1, m2(m1 > m2) have the same de Broglie
wavelength. Then,
(a) their momenta are the same.
(b) their energies are the same.
(c) energy of A1 is greater than the energy of A2
(d) energy of A1 is equal to the energy of A2
9 A particle moves in a closed orbit around the origin, due to a force which is directed
towards the origin. The de Broglie wavelength of the particle varies cyclically between
two values λ1, λ2 with λ1 > λ2. Which following statements are true?
(a) The particle could not be moving in a circular orbit with origin as centre.
(b) The particle could not be moving in an elliptic orbit with origin as its focus.
(c) When the de Broglie wavelength is λ1 the particle is nearer the origin than when its
value is λ2.
(d) When the de Broglie wavelength λ2, the particle is nearer the origin than when its
value λ1.
10 Stopping potential is of intensity of incident radiation but proportional to __________ of
the radiation.