Class 12th

If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is $4/3$ and the fish is 12cm  below the surface of water, the radius of the circle in centimeter is:

An alternating potential V=V₀ sin wt is applied across a circuit. As a result the current I=I₀ Sin $I=I_0 sin \left(\omega t-\frac{\pi }{2}\right)$  flows in it. The power consumed in the circuit per cycle is

The current in an inductor is given by $i=2+3t$  ampere where t is in second. The self?induced emf in it is $9 mV$ ; the energy stored in the inductor at t=1 second is

A current 1 flows along the length of an infinitely long, straight and thin?walled pipe. Then:

Two long conductors, separated by a distance d carry current $I_1$ and $I_2$ in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its directions is reversed. The distance is also increased to 3 d. The new value of the force between them is

A neutral point is obtained at the Centre of a vertical circular coil carrying current. The angle between the plane of the coil and the magnetic meridian is

As the switch S is closed in the circuit shown in figure, current passed through it is

The power of a heating coil is P. It is cut into two equal parts. The power of one of them across same mains is

Before connecting the circuit shown in figure all capacitors were uncharged. The circuit now is in steady state. Now the switch $S$  is closed. During the time the steady state is reached again:

Column?I	Column?II
i. Charge on C1	p. increases
ii. Charge on C2	q. decreases
iii. Charge on C3	r. remains same
iv. Charge on C4	s. becomes zero

Now, match the given columns and select the correct option from the codes given below.

Codes: