Question
Which physical quantities are conserved in natural and artificial radioactivity?

Answer

(1) Their charge is conserved.
(2) The sum of mass and energy remains conserved.
(3) Angular momentum and linear momentum are conserved.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Mention the disadvantages of phasor method of analysing AC circuits.
Draw a diagram to show the standing pressure wave and standing displacement wave for the 3rd overtone mode of vibration of an open organ pipe.
Explain Inductance. Give its unit and dimensions.
Find the height over the earth's surface at which the weight of a body becomes half of its value at the surface.
A man moves on a straight horizontal road with a block of mass $2\ kg$ in his hand. If he covers a distance of $40m$ with an acceleration of $0.5m/s^2$, find the work done by the man on the block during the motion.
The mass of a $H-$atom is less than the sum of the masses of a proton and electron. Why is this?
The magnetic field in a plane electromagnetic wave is given by $B_y=\left(2 \times 10^{-7}\right) T \sin \left(0.5 \times 10^3 x+1.5 \times 10^{11} t\right)$.
(a) What is the wavelength and frequency of the wave?
(b) Write an expression for the electric field.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Which of the following can act as a source of electromagnetic waves:
  1. A charge moving with a constant velocity.
  2. A charge moving in a circular orbit.
  3. A charge at rest.
Give reason.
A copper sphere is suspended in an evacuated chamber maintained at 300K. The sphere is maintained at a constant temperature of 500K by heating it electrically. A total of 210W of electric power is needed to do it. When the surface of the copper sphere is completely blackened, 700W is needed to maintain the same temperature of the sphere. Calculate the emissivity of copper.