MCQ
Force between two charges at rest is____?
- Aelectrostatic force.
- Belector magnetic force.
- Creal force.
- Ddynamic force.
Explanation:
Force between two charges at rest is electrostatic force of coulomb's law.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A coil is wound as a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor 2 and the number of turns per unit length of the coil remain the same, the self inductance increased by a factor of
|
(a) 16 |
(b) 12 |
(c) 8 |
(d) 4 |
Larger aperture of objective lens in an astronomical telescope:
An electron is moving in electric field and magnetic field it will gain energy from
|
(a) Electric field |
(b) Magnetic field |
(c) Both of these |
(d) None of these |
For a medium, refractive indices for violet, red and yellow are 1.62, 1.52 and 1.55 respectively, then dispersive power of medium will be
|
(a) 0.65 |
(b) 0.22 |
(c) 0.18 |
(d) 0.02 |
When hydrogen atom is in its first excited level, its radius is .... its ground state radius
|
(a) Half |
(b) Same |
(c) Twice |
(d) Four times |