Explanation
(A) (p) Capacitor is charged, hence its energy is increased
(q) The temperature is increased, hence its energy is increased or as the external positive work is done, hence energy increases
(r) The temperature decreases, its energy is decreased
(s) All natural process, energy of the system decreased
(t) The current is produced. Hence energy of the system increases
(B) (p), (r), (s) no mechanical energy is provided to the system
(q) The mechanical energy is provided which increases the temperature and hence random motion of molecules
(t) Mechanical work is done to change the magnetic field, which increases the mechanical energy of electron and these electrons strike with stationary positive charge and energy is converted in random motion
(C) (s) Internal binding energy is converted into mechanical energy
(D) (s) Mass changes only in nuclear process
Please disable the adBlock and continue. Thank you.
