Magnetism And Matter — Physics STD 12 Science — Question

What is the electric flux through a cube of side 1 cm which encloses an electric dipole?

Answer the following question:
A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle?

Should a thermometer bulb have large heat capacity or small heat capacity?

Choose the correct alternative from the clues given at the end of the each statement:
An atom has a nearly continuous mass distribution in a .......... but has a highly non-uniform mass distribution in .......... (Thomson’s model/ Rutherford’s model.)

Choose the correct alternative from the clues given at the end of the each statement:
The size of the atom in Thomson’s model is .......... the atomic size in Rutherford’s model. (much greater than/ no different from/ much less than.)

How does the mutual inductance of a pair of coils change when

1. Distance between the coils is increased and
2. Number of turns in the coils is increased?

What are the minority charge carriers in the semiconductor obtained by doping pure Ge crystal with Al ?

Give the logic symbol of NOR gate.

Equal currents are flowing through two infinitely long parallel wires. What will be the magnetic field at a point midway when the currents are flowing in the same direction?