In Young’s double-slit experiment, an interference pattern is obtained on a screen by a light of wavelength 6000 Å, coming from the coherent sources S1 and S2. At certain point P on the screen third dark fringe is formed. Then the path difference S1P – S2P in microns is
|
(a) 0.75 |
(b) 1.5 |
(c) 3.0 |
(d) 4.5 |
(b) 1.5
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A 100 mH coil carries a current of 1 ampere. Energy stored in its magnetic field is
|
(a) 0.5 J |
(b) 1 J |
(c) 0.05 J |
(d) 0.1 J |
When a positive q charge is taken from lower potential to a higher potential point, then its potential energy will
|
(a) Decrease |
(b) Increases |
(c) Remain unchanged |
(d) Become zero |
If only 2% of the main current is to be passed through a galvanometer of resistance G, then the resistance of shunt will be
|
(a) |
(b) |
(c) 50 G |
(d) 49 G |
Four capacitors are connected as shown in the equivalent capacitance between the points P and Q is
|
(a) 4 μF |
(b) |
(c) |
(d) |
