A listener observes the frequency βfβ of stationary source. If it move toward with 3
times of velocity of sound. Then the apparent frequency of the sound will be
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 frequency and work function of an incident photon are n andππ. If f0 is the threshold frequency, then necessary condition for the emission of photo electron is:
Light of frequency 2 times the threshold frequency is incident on the metalsurface. Ifthe frequency is by quartered and intensity is doubled, the photoelectric becomes
A charge of 2C experiences a force 2000N in a uniform electric field. In this fieldthe potential
difference between two points separated by a distance 1cm is