A frog can be deviated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
|
(a) Paramagnetic |
(b) Diamagnetic |
(c) Ferromagnetic |
(d) Antiferromagnetic |
(b) Diamagnetic
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Two slits are separated by a distance of 0.5 mm and illuminated with light of λ = 6000 Å. If the screen is placed 2.5 m from the slits. The distance of the third bright image from the centre will be
|
(a) 1.5 mm |
(b) 3 mm |
(c) 6 mm |
(d) 9 mm |
has half life 5700 years. At the end of 11400 years, the actual amount left is
|
(a) 0.5 of original amount |
(b) 0.25 of original amount |
|
(c) 0.125 of original amount |
(d) 0.0625 of original amount |
If threshold wavelength for sodium is 6800Å then the work function will be
|
(a) 1.8 eV |
(b) 2.5 eV |
(c) 2.1 eV |
(d) 1.4 eV |
Electromotive force is the force, which is able to maintain a constant
|
(a) Current |
(b) Resistance |
(c) Power |
(d) Potential difference |
If a glass prism is dipped in water, its dispersive power:
The wavelength of light in two liquids ‘x' and ‘y' is 3500 Å and 7000 Å, then the critical angle of x relative to y will be
|
(a) 60° |
(b) 45° |
(c) 30° |
(d) 15° |