Explanation:
A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy is called nuclear fusion.
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There is a solid sphere of radius ‘R’ having uniformly distributed charge. What is the relation between electric field ‘E’ (inside the sphere) and radius of sphere ‘R’ is
|
(a) E ∝ |
(b) E ∝ |
(c) E ∝ |
(d) E ∝ |
Five equal resistances each of value R are connected in a form shown alongside. The equivalent resistance of the network
|
(a) Between the points B and D is R |
(b) Between the points B and D is |
|
(c) Between the points A and C is R |
(d) b, c |
The cold junction of a thermocouple is maintained at 10℃. No thermo e.m.f. is developed when the hot junction is maintained at 530 ℃ . The neutral temperature is
|
(a) 260℃ |
(b) 270℃ |
(c) 265℃ |
(d) 520℃ |
Two electric dipoles of moment P and 64 P are placed in opposite direction on a line at a distance of 25 cm. The electric field will be zero at point between the dipoles whose distance from the dipole of moment P is
|
(a) 5 cm |
(b) |
(c) 10 cm |
(d) |
Work function of a metal is 2.51 eV. Its threshold frequency is
|
(a) 5.9 |
(b) 6.5 |
|
(c) 9.4 |
(d) 6.08 |
