Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

When light is incident on a doubly refracting crystal, two refracted rays-ordinary ray (O-ray) and extra ordinary ray (E-ray) are produced. Then(a) Both O-ray and E-ray are polarised perpendicular to the plane of incidence(b) Both O-ray and E-ray are polarised in the plane of incidence(c) E-ray is polarised perpendicular to the plane of incidence and O-ray in the plane of incidence(d) E-ray is polarised in the plane of incidence and O-ray perpendicular to the plane of incidence

The output of OR gate is 1(a) If both inputs are zero(b) If either or both inputs are 1(c) Only if both input are 1(d) If either input is zero

There are two metallic spheres of same radii, but one is solid, and the other is hollow, then:

A smaller sphere has potential 50V and a larger sphere has potential 100V. How should they be placed so that if they are connected with the help of a wire, the charge will flow from the smaller sphere to the larger sphere? Both the spheres are conducting and hollow.

A small cylindrical soft iron piece is kept in a galvanometer so that(a) A radial uniform magnetic field is produced(b) A uniform magnetic field is produced(c) There is a steady deflection of the coil(d) All of these

If two electric bulbs have 40 W and 60 W rating at 220 V, then the ratio of their resistances will be(a) 9 : 4    (b) 4 : 3(c) 3 : 8     (d) 3 : 2