Atoms — Physics STD 12 Science — Question

Diffraction effects are easier to notice in the case of sound waves than in the case of light waves because(a) Sound waves are longitudinal(b) Sound is perceived by the ear(c) Sound waves are mechanical waves(d) Sound waves are of longer wavelength

When two light nuclei fuse to form a relatively heavier nucleus, the specific binding energy of the product nucleus is:

A charge of 5 C  is given a displacement of 0.5 m. The work done in the process is 10 J. The potential difference between the two points will be (a) 2 V(b) 0.25 V (c) 1V(d) 25 V    

A thin metal plate P is inserted half way between the plates of a parallel plate capacitor of capacitance C in such a way that it is parallel to the two plates. The capacitance now becomes(a) C (b) C/2(c) 4C       (d) None of these

Impedance of L-R circuit is :

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential:

The speed of sound in a medium depends on:

1. The elastic property but not on the inertia property.
2. The inertia property but not on the elastic property.
3. The elastic property as well as the inertia property.
4. Neither the elastic property nor the inertia property.