Binding energy per nucleon plot against the mass number for stable nuclei is shown in the figure. Which curve is correct
|
(a) A |
(b) B |
(c) C |
(d) D |
(c) C
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Three unequal resistors in parallel are equivalent to a resistance 1 ohm. If two of them are in the ratio 1 : 2 and if no resistance value is fractional, the largest of the three resistances in ohms is
|
(a) 4 |
(b) 6 |
(c) 8 |
(d) 12 |
Coherent sources are those sources for which
|
(a) Phase difference remain constant |
|
(b) Frequency remains constant |
|
(c) Both phase difference and frequency remains constant |
|
(d) None of these |
The cathode of a photoelectric cell is changed such that the work function changes from W1 to W2 (W2>W1). If the current before and after change are I1 and I2, all other conditions remaining unchanged, then (assuming hn > W2)
|
(a) |
(b) |
(c) |
(d) |
When a ray of light emerges from a block of glass, the critical angle is
|
(a) Equal to the angle of reflection |
|
(b) The angle between the refracted ray and the normal |
|
(c) The angle of incidence for which the refracted ray travels along the glass-air boundary |
|
(d) The angle of incidence |
Three long, straight and parallel wires carrying currents are arranged as shown in figure. The force experienced by 10 cm length of wire Q is
|
(a) 1.4 |
(b) 1.4 |
|
(c) 2.6 |
(d) 2.6 |
