- AMagnetic equator.
- BMagnetic poles.
- CGeographic north pole.
- DLatitude 45º.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Three capacitors each of capacity 4μF are to be connected in such a way that the effective capacitance is 6 μF. This can be done by
|
(a) Connecting them in parallel |
(b) Connecting two in series and one in parallel |
|
(c) Connecting two in parallel and one in series |
(d) Connecting all of them in series |
A battery of emf 10 V and internal resistance 3Ω is connected to a resistor as shown in the figure. If the current in the circuit is 0.5 A. then the resistance of the resistor will be

|
(a) 19 W |
(b) 17 W |
(c) 10 W |
(d) 12 W |
A 100% efficient transformer has 100 turns in the primary and 25 turns in its secondary coil. If the current in the secondary coil is 4 amp, then the current in the primary coil is
|
(a) 1 amp |
(b) 4 amp |
(c) 8 amp |
(d) 16 amp |
At a certain place the horizontal component of the earth’s magnetic field is B0 and the angle of dip is 45o. The total intensity of the field at that place will be
|
(a) B0 |
(b) |
(c) 2B0 |
(d) |
The field due to a magnet at a distance R from the centre of the magnet is proportional to
|
(a) |
(b) |
(c) |
(d) |
In Thomson spectrograph experiment, four positive ions P,Q,R and S are situated on Y-X curve a shown in the figure

|
(a) The specific charge of R and S are same |
|
(b) The masses of P and S are same |
|
(c) The specific charges of Q and R are same |
|
(d) The velocities of R and S are same |