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

The number of protons in an atom of atomic number Z and mass number A is:

How many NAND gates are used to form an AND gate(a) 1 (b) 2(c) 3  (d) 4

An electric dipole placed in a non-uniform electric field can experience:

A magnifying glass is used to read the newspaper. As it is moved far away from the newspaper:

The total current supplied to the circuit by the battery is

Hubble's law is related with (a) Comet(b) Speed of galaxy (c) Black hole(d) Planetary motion

Assertion   :  Coloured spectrum is seen when we look through a muslin cloth.
Reason       : It is due to the diffraction of white light on passing through fine slits.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.

With increase in frequency of an A.C. supply, the inductive reactance.

A hollow sphere of charge does not produce an electric field at any(a) Point beyond 2 metres(b) Point beyond 10 metres(c) Interior point(d) Outer point