- ADyne
- BSiemen
- COhm
- DVolts
Explanation:
Unit of conductance is siemen.
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If the energy of a hydrogen atom in nth orbit is
, then energy in the nth orbit of a singley ionized helium atom will be
|
(a) 4 |
(b) |
(c) 2 |
(d) |
The transverse nature of light is shown by
|
(a) Interference of light |
(b) Refraction of light |
(c) Polarisation of light |
(d) Dispersion of light |
On the bombardment of neutron with Boron. a-particle is emitted and product nuclei formed is
|
(a) |
(b) |
(c) |
(d) |
An electric dipole is placed in an electric field generated by a point charge
|
(a) The net electric force on the dipole must be zero |
|
(b) The net electric force on the dipole may be zero |
|
(c) The torque on the dipole due to the field must be zero |
|
(d) The torque on the dipole due to the field may be zero |
Assertion : Neutrons penetrate matter more readily as compared to protons.
Reason : Neutrons are slightly more massive than protons.
|
(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. |
|
(d) If the assertion and reason both are false. |
Assertion : Photosensitivity of a metal is high if its work function is small.
Reason : Work function =
where
is the threshold frequency.
|
(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. |
|
(d) If the assertion and reason both are false. |