Magnetic permeability is maximum for
|
(a) Diamagnetic substance |
(b) Paramagnetic substance |
|
(c) Ferromagnetic substance |
(d) All of these |
Magnetic permeability is maximum for
|
(a) Diamagnetic substance |
(b) Paramagnetic substance |
|
(c) Ferromagnetic substance |
(d) All of these |
(c) Ferromagnetic substance
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Assertion : There is no atmosphere on moon
Reason : Escape velocity at the surface of moon is low.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(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. |
The ionisation energy of hydrogen atom is 13.6 eV. Following Bohr's theory, the energy corresponding to a transition between the 3rd and the 4th orbit is
|
(a) 3.40 eV |
(b) 1.51 eV |
(c) 0.85 eV |
(d) 0.66 eV |
Assertion : Newton’s rings are formed in the reflected system. When the space between the lens and the glass plate is filled with a liquid of refractive index greater than that of glass, the central spot of the pattern is dark.
Reason : The reflection is Newton’s ring cases will be from a denser to a rarer medium and the two interfering rays are reflected under similar conditions.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Two electrolytic cells containing
and
respectively are connected in series and a current is passed through them until 1 mg of copper is deposited in the first cell. The amount of silver deposited in the second cell during this time is approximately [Atomic weights of copper and silver are respectively 63.57 and 107.88]
|
(a) 1.7 mg |
(b) 3.4 mg |
(c) 5.1 mg |
(d) 6.8 mg |