- AWhose potential is zero
- ✓Which has the same potential at all points.
- COn which negative potential exists.
- DOn which positive potential exists.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A glass prism (μ = 1.5) is dipped in water (μ = 4/3) as shown in figure. A light ray is incident normally on the surface AB. It reaches the surface BC after totally reflected, if
|
(a) sinθ ≥ 8/9 |
(b) 2/3 < sinθ < 8/9 |
(c) sin θ ≤ 2/3 |
(d) It is not possible |
When N-type of semiconductor is heated
|
(a) Number of electrons increases while that of holes decreases |
|
(b) Number of holes increases while that of electrons decreases |
|
(c) Number of electrons and holes remains same |
|
(d) Number of electrons and holes increases equally |
Positive rays was discovered by
|
(a) Thomson |
(b) Goldstem |
(c) W. Crookes |
(d) Rutherford |
X-rays are produced in X-ray tube operating at a given accelerating voltage. The wavelength of the continuous X-rays has values from
| (a) 0 to ∞ |
|
(b) |
|
(c) 0 to |
|
(d) |