- AElectron
- BProton
- CHe+
- DLi++
Explanation:
$|\text{F}|=|\text{qVB}|$
charge of Li++ > charge of ( He+, proton, electron)
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
An object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm The size of the image is
|
(a) 9.2 cm |
(b) 10.5 cm |
(c) 5.6 cm |
(d) 7.5 cm |
A person is suffering from myopic defect. He is able to see clear objects placed at 15 cm. What type and of what focal length of lens he should use to see clearly the object placed 60 cm away
|
(a) Concave lens of 20 cm focal length |
(b) Convex lens of 20 cm focal length |
|
(c) Concave lens of 12 cm focal length |
(d) Convex lens of 12 cm focal length |
prism can produce a minimum deviation $\delta$ in a light beam. If three such prisms are combined, the minimum deviation that can be produced in this beam is:
If the energy released in the fission of one nucleus is 200 MeV. Then the number of nuclei required per second in a power plant of 16 kW will be
|
(a) 0.5 |
(b) 0.5 |
(c) 5 |
(d) 5 |
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) |