Magnifying power of a simple microscope is (when final image is formed at D = 25 cm from eye)
|
(a) |
(b) 1 + |
(c) |
(d) |
Magnifying power of a simple microscope is (when final image is formed at D = 25 cm from eye)
|
(a) |
(b) 1 + |
(c) |
(d) |
(b) 1 +
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Two capacitors of 10 μF and 20 μF are connected in series with a 30V battery. The charge on the capacitors will be, respectively
|
(a) 100 μC, 200 μC |
(b) 200 μC, 100 μC |
(c) 100 μC, 100 μC |
(d) 200 μC, 200 μC |
The magnetic induction in air at a point 1cm away from a long wire that carries a current of 1A, will be
|
(a) |
(b) 2 |
(c) 3 |
(d) 4 |
Masses of 3 wires of same metal are in the ratio 1 : 2 : 3 and their lengths are in the ratio 3 : 2 : 1. The electrical resistances are in ratio
|
(a) 1 : 4 : 9 |
(b) 9 : 4 : 1 |
(c) 1 : 2 : 3 |
(d) 27 : 6 : 1 |
In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms is
|
(a) 200 |
(b) 100 |
(c) 10 |
(d) 50 |
If there had been one eye of the man, then
|
(a) Image of the object would have been inverted |
(b) Visible region would have decreased |
|
(c) Image would have not been seen three dimensional |
(d) (b) and (c) both |
Four resistances of 100 W each are connected in the form of square. Then, the effective resistance along the diagonal points is
|
(a) 200 W |
(b) 400 W |
(c) 100 W |
(d) 150 W |
The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is
|
(a) 15o |
(b) 30 o |
(c) 45 o |
(d) 60 o |