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

The energy of a charged capacitor resides in

(a) The electric field only	(b) The magnetic field only
(d) Neither in electric nor magnetic field	(d) Neither in electric nor magnetic field

When X  rays pass through a strong uniform magnetic field, Then they

(a) Do not get deflected at all

(b) Get deflected in the direction of the field

(c) Get deflected in the direction opposite to the field

(d) Get deflected in the direction perpendicular to the field

The process by which a heavy nucleus splits into light nuclei is known as

(a) Fission

(b) α- decay

(c) Fusion

(d) Chain reaction

A person wishes to distinguish between two pillars located at a distance of 11km. What should be the minimum distance between these pillars (resolving power of normal human eye is 1')?

The process of superimposing signal frequency (i.e. audio wave) on the carrier wave is known as

(a) Transmission

(b) Reception

(c) Modulation

(d) Detection

When a hole is produced in P-type semiconductor, there is:

In good conductors of electricity, the type of bonding that exists is

(a) Ionic

(b) Vander Waals

(c) Covalent

(d) Metallic

A particle moves in a region having a uniform magnetic field and a parallel, uniform electric field. At some instant, the velocity of the particle is perpendicular to the field direction. The path of the particle will be:

A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity 20000 V/m. If mass of the particle is 9.6  , the charge on it and excess number of electrons on the particle are respectively  (g =

(a) 4.8

(b) 5.8

(c) 3.8

(d) 2.8

Which of the following cannot be used in electronic devices?