Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Potential difference between the points P and Q in the electric circuit shown is
|
(a) 4.5 V |
(b) 1.2 V |
(c) 2.4 V |
(d) 2.88 V |
When light of wavelength λ is incident on an equilateral prism kept in its minimum deviation position, it is found that the angle of deviation equals the angle of the prism itself. The refractive index of the material of the prism for the wavelength λ is, then
|
(a) |
(b) |
(c) 2 |
(d) |
The range of wavelength of the visible light is
|
(a) 10 Å to 100 Å |
(b) 4,000 Å to 8,000 Å |
(c) 8,000 Å to 10,000 Å |
(d) 10,000 Å to 15,000 Å |
Two point charges of 20μC and 80 μC are 10 cm apart. Where will the electric field strength be zero on the line joining the charges from 20 μC charge
|
(a) 0.1 m |
(b) 0.04 m |
(c) 0.033 m |
(d) 0.33 m |
Assertion : Only microwaves are used in radar.
Reason : Because microwaves have very small wavelength.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
