- AStatic current
- BConventional current
- CElectronic current
- DPotential current
Explanation:
The carriers of electric current are electrons. The current in a circuit is due to the flow of electrons. Therefore, the direction of the conventional current is opposite to the direction of flow of electrons.
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When
transforms to
, then the number of the emitted a- and b-particles is, respectively
|
(a) 8α, 7β |
(b) 4α, 7β |
(c) 4 α, 4β |
(d) 4α, 1β |
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side on its principal axis, the intensity of light:
The radius of a nucleus of a mass number A is directly proportional to
|
(a) |
(b) A |
(c) |
(d) |
The electric field between the two spheres of a charged spherical condenser
|
(a) Is zero |
(b) Is constant |
|
(c) Increases with distance from the centre |
(d) Decreases with distance from the centre |
Two bulbs are in parallel and they together consume 48 W from a battery of 6 V. The resistance of each bulb is
|
(a) 0.67 Ω |
(b) 3.0 Ω |
(c) 4.0 Ω |
(d) 1.5 Ω |
A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum
|
(a) 6500 Å |
(b) 5400 Å |
(c) 4700 Å |
(d) All the above |
A study of binary stars is most helpful in
|
(a) Finding their distances |
(b) Finding their temperature |
|
(c) Finding their masses |
(d) Verifying Newton's force law of gravitation |