A body of mass m having an initial velocity v, makes head on elastic collision with a stationary body of mass
m. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will
happen only when:
The distance between the plates of a charged parallel plate capacitor is 4mm and potential
difference is 6 volts. If the distance between the plates is increased to 12mm, then :
Between the plates of a parallel plate condenser there is 1mm thick paper of dielectric constant 4. Itis
charged at 100 volt. The electric field in volt/meter between the plates of the capacitor is:
A listener observes the frequency “f” of stationary source. If it move toward with 3
times of velocity of sound. Then the apparent frequency of the sound will be