Physics
A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
The speeds of both the photons in vacuum are different
The frequency of X-ray photon is higher than the frequency of visible radiation photon.
Both the photons have different energies.

ANSWER DOWNLOAD EXAMIANS APP

Physics
A cyclist leans inwards when he is negotiating a curve so that

His weight may be reduced
No frictional force may be produced between the wheels and the axle
Necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
He may increase his speed

ANSWER DOWNLOAD EXAMIANS APP