Equivalent resistance between A and B will be
|
(a) 2 ohm |
(b) 18 ohm |
(c) 6 ohm |
(d) 3.6 ohm |
Equivalent resistance between A and B will be
|
(a) 2 ohm |
(b) 18 ohm |
(c) 6 ohm |
(d) 3.6 ohm |
(d) 3.6 ohm
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Characteristic X-rays are produced due to
|
(a) Transfer of momentum in collision of electrons with target atoms |
|
(b) Transition of electrons from higher to lower electronic orbits in an atom |
|
(c) Heating of the target |
|
(d) Transfer of energy in collision of electrons with atoms in the target |
The insulated spheres of radii
and
having charges
and
respectively are connected to each other. There is
|
(a) No change in the energy of the system |
|
(b) An increase in the energy of the system |
|
(c) Always a decrease in the energy of the system |
|
(d) A decrease in the energy of the system unless |
The approximate wavelength of a photon of energy 2.48 eV is
|
(a) 500 Å |
(b) 5000 Å |
(c) 2000 Å |
(d) 1000 Å |
The emf of a battery is 2 V and its internal resistance is 0.5 W. The maximum power which it can deliver to any external circuit will be
|
(a) 8 Watt |
(b) 4 Watt |
(c) 2 Watt |
(d) None of the above |
When the length and area of cross-section both are doubled, then its resistance
|
(a) Will become half |
(b) Will be doubled |
|
(c) Will remain the same |
(d) Will become four times |
The time taken by sunlight to cross a 5 mm thick glass plate (μ = 3/2) is
|
(a) 0.25 |
(b) 0.167 |
(c) 2.5 |
(d) 1.0 |