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

Inductive reactance of a coil is expressed in.

The mass of a neutron is:

One Tesla is equal to

(a)

(b)

(c)

(d)

Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current which increases with time. In response, the loop-B

(a) Remains stationary

(b) Is attracted by the loop-A

(c) Is repelled by the loop-A

(d) Rotates about its CM, with CM fixed

At the magnetic north pole of the earth, the value of horizontal component of earth's magnetic field and angle of dip are, respectively

(a) Zero, maximum	(b) Maximum, minimum
(c) Maximum, maximum	(d) Minimum, minimum

X-rays which can penetrate through longer distances in substance are called

(a) Soft X-rays

(b) Continuous X-rays

(c) Hard X-rays

(d) None of the above

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:

What happens when some charge is placed on a soap bubble?

If a radioactive element is placed in an evacuated chamber, then the rate of radioactive decay will:

If the net electric flux through a closed surface is zero, then we can infer: