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Assertion : Magnetic flux can produce induced e.m.f.
Reason : Faraday established induced e.m.f. experimentally.
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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 assertion is false but reason is true. |
Which of the following statement is true about magnetic moments of atoms of different elements
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(a) All have a magnetic moment |
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(b) None has a magnetic moment |
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(c) All acquire a magnetic moment under external magnetic field and in same direction as the field |
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(d) None of the above statements are accurate |
The amount of heat produced in a resistor when a current is passed through it can be found using
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(a) Faraday’s Law |
(b) Kirchhoff’s Law |
(c) Laplace’s Law |
(d) Joule’s Law |
$\frac{\text{l}_1+\text{l}_2}{2}$
$\sqrt{\text{l}_2\text{l}_2}$
$\frac{\text{l}_1\text{T}_2-\text{l}_2\text{T}_1}{\text{T}_2-\text{T}_1}$
$\frac{\text{l}_1\text{T}_2+\text{l}_2\text{T}_1}{\text{T}_2+\text{T}_1}$
Hydrogen (H), deuterium (D), singly ionized helium (
and doubly ionized lithium (Li) all have one electron around the nucleus. Consider n =2 to n = 1 transition. The wavelengths of emitted radiations are 
and 
respectively. Then approximately
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(a) |
(b) 4 |
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(c) |
(d) |
A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed are
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(a) 1 |
(b) 5 |
(c) 4 |
(d) 3 |
A photon of 1.7 
Joules is absorbed by a material under special circumstances. The correct statement is
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(a) Electrons of the atom of absorbed material will go the higher energy states |
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(b) Electron and positron pair will be created |
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(c) Only positron will be produced |
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(d) Photoelectric effect will occur and electron will be produced |
