Sunday, October 11, 2009

IIT JEE Physics Final Revision Set 7

1. The resolving power of an electron microscope is higher than that of an optical microscope because the wavelength of electron is ---- than the wavelength of visible light.

2. In the Bohr model of the hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in a quantum state n is _______.

3. Five point charges, each of value +q, are placed on five vertices of a regular hexagon of side L. The magnitude of the force on a point charge of value -q placed at the centre of the hexagon is _______ netwtons.

4. A ray of light undergoes deviation of 30° when incident on an equilateral prism of refractive index √2. The angle made by the ray inside the prism with the base of the prism is ______ .

5. A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with the track is

a. zero b. 45° c. 30° d. 60°

Source 1992 JEE

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