Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

A magnet is dropped down an infinitely long vertical copper tube(a) The magnet moves with continuously increasing velocity and ultimately acquires a constant terminal velocity (b) The magnet moves with continuously decreasing velocity and ultimately comes to rest(c) The magnet moves with continuously increasing velocity but constant acceleration(d) The magnet moves with continuously increasing velocity and acceleration

A beam of light propagating in medium A with index of refraction n (A) passes across an interface into medium B with index of refraction n(B). The angle of incidence is greater than the angle of refraction; v(A) and v(B) denotes the speed of light in A and B. Then which of the following is true (a) v(A) > v(B)  and n(A) > n(B)(b) v(A) > v(B)  and  n(A) < n(B)(c) v(A) < v(B)  and  n(A) > n(B)(d) v(A) < v(B)  and  n(A) < n(B)

Nuclear binding energy is equivalent to(a) Mass of proton(b) Mass of neutron(c) Mass of nucleus(d) Mass defect of nucleus

In a room containing air, heat can go from one place to another:

1. By conduction only.
2. By convection only.
3. By radiation only.
4. By all the three modes.

Statement-1: NOT gate is also called invertor circuit.Statement-2: NOT gate inverts the input order.

The fringe width in interference of light due to two coherent sources is :

Which conservation law is obeyed in Einstein's photoelectric equation?

The fusion of light elements take place at about the temperatures of about:

A dielectric slab is inserted between the plates of an isolated capacitor. The force between the plates will:

1. Increase.
2. Decrease.
3. Remain unchanged.
4. Become zero.