Atoms — Physics STD 12 Science — Question

For nuclei with A > 100:

1. The binding energy of the nucleus decreases on an average as A increases.
2. The binding energy per nucleon decreases on an average as A increases.
3. If the nucleus breaks into two roughly equal parts, energy is released.
4. If two nuclei fuse to form a bigger nucleus, energy is released.

When a lamp is connected in series with capacitor, then

(a) Lamp will not glow	(b) Lamp will burst out
(c) Lamp will glow normally	(d) None of these

Nuclear forces are:

An infinitely long, straight conductor AB is fixed and a current is passed through it. Another movable straight wire CD of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire

(a) The rod CD will move upwards parallel to itself

(b) The rod CD will move downward parallel to itself

(c) The rod CD will move upward and turn clockwise at the same time

(d) The rod CD will move upward and turn anti –clockwise at the same time

Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current

(a) a

(b) b

(c) c

(d) d

In the hysteresis cycle, the value of H needed to make the intensity of magnetism zero is called:

If the number of turns in a moving coil galvanometer is increased its sensitivity :

Out of the following sources which gives best monochromatic light ?