- APositive ions.
- BNegative ions.
- CBoth a and b.
- DNone.
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If m is mass of electron, v its velocity, r the radius of stationary circular orbit around a nucleus with charge Ze, then from Bohr's first postulate, the kinetic energy K =
of the electron in C.G.S. system is equal to
|
(a) |
(b) |
(c) |
(d) |
Gauss is unit of which quantity
|
(a) H |
(b) B |
(c) ∅ |
(d) I |
What kind of image is obtained always for concave lens?
A 10 ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
|
(a) 1310 W |
(b) 670 W |
(c) 810 W |
(d) 1210 W |


When neutrons are bombarded on nucleus of
, the number of emitted neutrons will be
|
(a) 1 |
(b) 2 |
(c) 3 |
(d) 4 |
When an electron in hydrogen atom is excited, from its 4th to 5th stationary orbit, the change in angular momentum of electron is (Planck’s constant: h = 6.6
|
(a) 4.16 |
(b) 3.32 |
|
(c) 1.05 |
(d) 2.08 |
In the circuit given, the correct relation to a balanced Wheatstone bridge is

|
(a) |
(b) |
(c) |
(d) None of these |