In the given figure, potential difference between A and B is
|
(a) 0 |
(b) 5 volt |
(c) 10 volt |
(d) 15 volt |
In the given figure, potential difference between A and B is
|
(a) 0 |
(b) 5 volt |
(c) 10 volt |
(d) 15 volt |
(c) 10 volt
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For the magnetic field to be maximum due to a small element of current carrying conductor at a point, the angle between the element and the line joining the element to the given point must be
|
(a) 0° |
(b) 90° |
(c) 180° |
(d) 45° |
The angle of dip at a place on the earth gives
|
(a) The horizontal component of the earth's magnetic field |
| (b) The location of the geographic meridian |
|
(c) The vertical component of the earth's field |
|
(d) The direction of the earth's magnetic field |
Two electric bulbs rated
watt V volts and
watt V volts are connected in parallel and V volts are applied to it. The total power will be
|
(a) |
(b) |
(c) |
(d) |
An electron (charge = 1.6 coulomb) is accelerated through a potential of 1,00,000 volts. The energy required by the electron is
|
(a) 1.6 |
(b) 1.6 |
(c) 0.53 |
(d) 1.6 |
The two metallic plates of radius r are placed at a distance d apart and its capacity is C. If a plate of radius r/2 and thickness d of dielectric constant 6 is placed between the plates of the condenser, then its capacity will be
|
(a) 7C/2 |
(b) 3C/7 |
(c) 7C/3 |
(d) 9C/4 |
In nuclear reaction
A denotes
|
(a) Electron |
(b) Positron |
(c) Proton |
(d) Neutron |
If each resistance in the figure is of 9 W then reading of ammeter is
|
(a) 5 A |
(b) 8 A |
(c) 2 A |
(d) 9 A |
Two concentric circular coils of ten turns each are situated in the same plane. Their radii are 20 and 40 cm and they carry respectively 0.2 and 0.3 ampere current in opposite direction. The magnetic field in
at the centre is
|
(a) |
(b) |
(c) |
(d) |