A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes through the coil. When it is converted to a 10 A ammeter, the shunt resistance is
|
(a) 0.01 W |
(b) 0.05 W |
(c) 2000 W |
(d) 5000 W |
(b) 0.05 W
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Which can pass through 20 cm thickness of the steel
|
(a) α - particles |
(b) β - particles |
(c) γ- rays |
(d) Ultraviolet rays |
A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is 10.2 eV. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector
|
(a) 2 photon of energy 10.2 eV |
|
(b) 2 photon of energy of 1.4 eV |
|
(c) One photon of energy 10.2 eV and an electron of energy 1.4 eV |
|
(d) One photon of energy 10.2 eV and another photon of 1.4 eV |
A force F acts between sodium and chlorine ions of salt (sodium chloride) when put 1 cm apart in air. The permittivity of air and dielectric constant of water are 
and K respectively. When a piece of salt is put in water electrical force acting between sodium and chlorine ions 1 cm apart is
|
(a) |
(b) |
(c) |
(d) |
A combination of two thin lenses of the same material with focal lengths 
and 
, arranged on a common axis minimizes chromatic aberration, if the distance between them is
|
(a) |
(b) |
(c) ( |
(d) |
A plane mirror is approaching you at a speed of 10 cm/sec You can see your image in it. At what speed will your image approach you
| (a) 10 cm/sec | (b) 5 cm/sec | (c) 20 cm/sec | (d) 15 cm/sec |
