- ANo permanent dipole moment.
- BPermanent dipole moment.
- CBoth a and b.
- DNone.
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A person using a lens as a simple microscope sees an:
If and
are respectively the filament resistances of a 200 watt bulb and 100 watt bulb designed to operate on the same voltage, then
|
(a) |
(b) |
|
(c) |
(d) |
A long straight wire carrying current of 30A is placed in an external uniform magnetic field of induction 4 × 10–4 T. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point 2.0 cm away from the wire is
|
(a) 10–4 |
(b) 3 × 10–4 |
(c) 5 × 10–4 |
(d) 6 × 10–4 |
The refractive index of water is 1.33. What will be the speed of light in water
|
(a) 3 |
(b) 2.25 |
(c) 4 |
(d) 1.33 |
In the following circuit, bulb rated as 1.5 V, 0.45 W. If bulbs glows with full intensity then what will be the equivalent resistance between X and Y
|
(a) 0.45 W |
(b) 1 W |
(c) 3 W |
(d) 5 W |
Donor type impurity is found in
|
(a) Trivalent elements |
(b) Pentavalent elements |
|
(c) In both the above |
(d) None of these |
When objects at different distances are seen by the eye, which of the following remains constant
|
(a) The focal length of the eye lens |
(b) The object distance from the eye lens |
|
(c) The radii of curvature of the eye lens |
(d) The image distance from the eye lens |