- AA point.
- BA line along north-south.
- CA horizontal plane.
- DA vertical plane.
Explanation:
Magnetic meridian at a place is not a line but a vertical plane passing through the axis of a freely suspended magnet.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
NPN transistor are preferred to PNP transistor because they have
|
(a) Low cost |
|
(b) Low dissipation energy |
|
(c) Capability of handing large power |
|
(d) Electrons having high mobility than holes |
When the current i is flowing through a conductor, the drift velocity is v. If 2i current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be
|
(a) v/4 |
(b) v/2 |
(c) v |
(d) 4v |
In a typical Wheatstone network, the resistances in cyclic order are A = 10 W, B = 5 W, C = 4 W and D = 4 W for the bridge to be balanced

|
(a) 10 W should be connected in parallel with A |
|
(b) 10 W should be connected in series with A |
|
(c) 5 W should be connected in series with B |
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(d) 5 W should be connected in parallel with B |

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
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(a) 10–4 |
(b) 3 × 10–4 |
(c) 5 × 10–4 |
(d) 6 × 10–4 |
Effective capacitance between A and B in the figure shown is (all capacitance are in mF)

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(a) 21 mF |
(b) 23 mF |
(c) |
(d) |
A man runs towards a mirror at a speed 15 m/s The speed of the image relative to the man is
|
(a) 15 |
(b) 30 |
(c) 35 |
(d) 20 |
A horizontal straight conductor kept in north-south direction falls under gravity, then
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(a) A current will be induced from South to North |
|
(b) A current will be induced from North to South |
|
(c) No induce e.m.f. along the length of conductor |
|
(d) An induced e.m.f. is generated along the length of conductor |