10 wires (same length, same area, same material) are connected in parallel and each has 1 Ω resistance, then the equivalent resistance will be
|
(a) 10 Ω |
(b) 1 W |
(c) 0.1 W |
(d) 0.001 W |
(c) 0.1 W
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In a good conductor the energy gap between the conduction band and the valence band is
|
(a) Infinite |
(b) Wide |
(c) Narrow |
(d) Zero |
A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature 36 cm. The distance of the object from the mirror is
|
(a) 5 cm |
(b) 12 cm |
(c) 10 cm |
(d) 20 cm |
The sun revolves around the galaxy with a speed of 250 km/sec and it's radius is 3 × 104 light year. The mass of the milky way is
|
(a) 3 × 1040 kg |
(b) 3 × 1041 kg |
(c) 5 × 1040 kg |
(d) 6 × 1041 kg |
In a fission process, nucleus A divides into two nuclei B and C, their binding energies being 
and 
respectively. Then
|
(a) |
(b) |
(c) |
(d) |
When a copper voltameter is connected with a battery of e.m.f. 12 volts. 2 gms of copper is deposited in 30 minutes. If the same voltameter is connected across a 6 volt battery, then the mass of copper deposited in 45 minutes would be
|
(a) 1 gm |
(b) 1.5 gm |
(c) 2 gm |
(d) 2.5 gm |
