- A8
- B6
- C15
- D∞
Explanation:
Number of spectral lines in hydrogen atom ∞.
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A charged particle is moving in a uniform magnetic field in a circular path. Radius of circular path is R. When energy of particle is doubled, then new radius will be
|
(a) R |
(b) |
(c) 2 R |
(d) 3 R |
$\text{P}=\lim_\limits{\triangle\text{s}\rightarrow0}\frac{\text{F}}{\triangle\text{s}}$ and $\text{P}_1-\text{P}_2-\text{pgz}$
In an elevator accelerating upward.In the given figure, the equivalent resistance between the points A and B is
|
(a) 8 W |
(b) 6 W |
(c) 4 W |
(d) 2 W |
In a plano-convex lens the radius of curvature of the convex lens is 10 cm. If the plane side is polished, then the focal length will be (Refractive index = 1.5)
|
(a) 10.5 cm |
(b) 10 cm |
(c) 5.5 cm |
(d) 5 cm |
The expression for thermo e.m.f. in a thermocouple is given by the relation E = 40 θ - , where θ is the temperature difference of two junctions. For this, the neutral temperature will be
|
(a) 100℃ |
(b) 200℃ |
(c) 300℃ |
(d) 400℃ |
The capacity of a condenser in which a dielectric of dielectric constant 5 has been used, is C. If the dielectric is replaced by another with dielectric constant 20, the capacity will become
|
(a) |
(b) 4C |
(c) |
(d) 2C |