The charges Q, +q, and +q are placed at the vartices of an equilateral
The charges Q, +q, and +q are placed at the vartices of an equilateral triangle of side l. If the net electrostatic potential energy of the system is zero, the Q is equal to
KA2008
If an electron and a proton have the same de-Broglie wavelength, then the kinetic
If an electron and a proton have the same de-Broglie wavelength, then the kinetic energy of the electron is
Options
(a) More than that of a proton (b) Equal to that of a […]
The maximum kinetic energy of emitted electrons in a photoelectric effect
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon
Options
(a) Intensity (b) Work function (c) Wavelength (d) Frequency
Correct Answer:
Intensity
Explanation:
The maximum kinetic energy = […]
When a piece of metal is illuminated by a monochromatic light of wavelength λ,
When a piece of metal is illuminated by a monochromatic light of wavelength λ, then stopping potential is 3Vs. When same surface is illuminated by light of wavelength 2λ, then stopping potential becomes Vs. The […]
The most stable particle in Baryon group is
The most stable particle in Baryon group is
Options
(a) Proton (b) Lamda-particle (c) Neutron (d) Omega-particle
Correct Answer:
Proton
Explanation:
The proton is the most stable in the Baryon group.
On bombarding U²³⁵ by slow neutron, 200 MeV energy is released. If the power output
On bombarding U²³⁵ by slow neutron, 200 MeV energy is released. If the power output of atomic reactor is 1.6 MW, then the rate of fission will be
Options
(a) 8×10¹⁶/s (b) 20×10¹⁶/s (c) […]
The ratio of the nuclear radii of elements with mass numbers 216 and 125 is
The ratio of the nuclear radii of elements with mass numbers 216 and 125 is
Options
(a) (6:5) (b) √216:√125 (c) 218:05:00 (d) None of these
Correct Answer:
(6:5)
Explanation:
Nuclear radius of the […]
A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest
A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest its time period is T. With what acceleration should the lift be accelerated upwards in order to reduce […]
A body of mass 4 kg is accelerated upon by a constant force travels
A body of mass 4 kg is accelerated upon by a constant force travels a distance of 5 m in the first second and a distance of 2 m in the third second. The force […]
A certain current on passing through a galvanometer produces a deflection
A certain current on passing through a galvanometer produces a deflection of 100 divisions. When a shunt of one ohm is connected, the deflection reduces to division. The galvanometer resistance is
Options
(a) […]