Geometrical Optics — Physics STD 12 Science — Question

Can alternating galvanometer measure both alternating and direct currents?

Identify the type of waves which are produced by the following way and write one application for each:

1. Radioactive decay of the nucleus.
2. Rapid acceleration and decelerations of electrons in aerials.
3. Bombarding a metal target by high energy electrons.

For a transistor amplifier, the voltage gain,

1. Remains constant for all frequencies.
2. Is high at high and low frequencies and constant in the middle frequency range.
3. Is low at high and low frequencies and constant at mid frequencies.
4. None of the above.

Write the upper and lower limits of interference in terms of path difference.

Define minimum deviation angle.

Two particles A and B start from rest and move for equal time on a straight line. The particle A has an acceleration a for the first half of the total time and 2a for the second half. The particle B has an acceleration 2a for the first half and a for the second half. Which particle has covered larger distance?

Define potential at a point.

In which configuration will an electric dipole be in (i) permanent and (ii) temporary equilibrium when placed under a uniform electric field?