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

A nucleus  emits one α  and one β  particles. The resulting nucleus is

(a)

(b)

(c)

(d)

The wire wound resistor is also known as:

What happens to the capacitance when a dielectric material is inserted between the plates of a parallel plate capacitor?

A point source of light is placed in front of a plane mirror:

1. All the reflected rays meet at a point when produced backward.
2. Only the reflected rays close to the normal meet at a point when produced backward.
3. Only the reflected rays making a small angle with the mirror, meet at a point when produced backward.
4. Light of different colours make different images.

The layered lens is made of two kinds of glass. A point source of light is placed on its principal axis. If the reflections from the boundaries between layers are ignored, the lens will form

Identify the correct statement from below:

A Zener diode:

The amount of heat produced in a resistor when a current is passed through it can be found using

(a) Faraday’s Law

(b) Kirchhoff’s Law

(c) Laplace’s Law

(d) Joule’s Law

A person who is at rest as the charge moves by him will measure.

A monochromatic beam of light falls on YDSE apparatus at some angle (say q) as shown in figure. A thin sheet of glass is inserted in front of the lower slit S₂. The central bright fringe (path difference = 0) will be obtained

(a) At O

(b) Above O

(c) Below O

(d) Anywhere depending on angle q, thickness of plate t and refractive index of glass m