- A1.6 × 10–19 coulomb.
- B6.25 × 10–18 coulomb.
- CZero.
- DInfinite.
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Refractive index for a material for infrared light is
|
(a) Equal to that of ultraviolet light |
|
(b) Less than for ultraviolet light |
|
(c) Equal to that for red colour of light |
|
(d) Greater than that for ultraviolet light |
By Huygen's wave theory of light, we cannot explain the phenomenon of
|
(a) Interference |
(b) Diffraction |
(c) Photoelectric effect |
(d) Polarisation |
The coefficient of self inductance of a solenoid is 0.18 mH. If a crode of soft iron of relative permeability 900 is inserted, then the coefficient of self inductance will become nearly
|
(a) 5.4 mH |
(b) 162 mH |
(c) 0.006 mH |
(d) 0.0002 mH |
A circular loop of radius R carrying current I lies in x-y plane with its centre at origin. The total magnetic flux through x-y plane is
|
(a) Directly proportional to I |
(b) Directly proportional to R |
|
(c) Directly proportional to |
(d) Zero |
Rutherford’s a - particle experiment showed that the atoms have
|
(a) Proton |
(b) Nucleus |
(c) Neutron |
(d) Electrons |