A charged particle moves through a magnetic field perpendicular to its direction. Then

• the momentum changes but the kinetic energy is constant

• both momentum and kinetic energy of the particle are not constant

• both, momentum and kinetic energy of the particle are constant

• kinetic energy changes but the momentum is constant

The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are K_A, K_B and K_C, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then

Pressure of an ideal gas is increased by keeping temperature constant. What is the effect on kinetic energy of molecules?

Pressure of an ideal gas is increased by keeping temperature constant. What is effect on kinetic energy of molecules?