- AHuygen
- BNewton
- CMaxwell
- DHertz
Explanation:
The corpuscular theory was largely developed by Sir Isaac newton. Newton's theory remained in force for more than 100 years and took precedence over Huygen's wave front theory, partly because of Newton’s great prestige.
When the corpuscular theory failed to adequately explain the diffraction, interference and polarization of light it was abandoned in favour of Huygens' wave theory.
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If no external voltage is applied across P-N junction, there would be
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(a) No electric field across the junction |
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(b) An electric field pointing from N-type to P-type side across the junction |
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(c) An electric field pointing from P-type to N-type side across the junction |
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(d) A temporary electric field during formation of P-N junction that would subsequently disappear |
Assertion : A red object appears dark in the yellow light
Reason : A red colour is scattered less
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Fermi level of energy of an intrinsic semiconductor lies
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(a) In the middle of forbidden gap |
(b) Below the middle of forbidden gap |
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(c) Above the middle of forbidden gap |
(d) Outside the forbidden gap |
An ideal coil of 10 henry is joined in series with a resistance of 5 ohm and a battery of 5 volt. 2 second after joining, the current flowing in ampere in the circuit will be
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(a) |
(b) |
(c) (1 – e) |
(d) e |
The production of e.m.f. by maintaining a difference of temperature between the two junctions of two different metals is known as
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(a) Joule effect |
(b) Seebeck effect |
(c) Peltier effect |
(d) Thomson effect |
The slits in a Young's double slit experiment have equal widths and the source is placed symmetrically relative to the slits. The intensity at the central fringes is I0. If one of the slits is closed, the intensity at this point will be
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(a) I0 |
(b) I0 / 4 |
(c) I0 / 2 |
(d) 4I0 |