- AAttract each other
- BRepel each other
- CNeither attract nor repel
- DRotate
Explanation:
Two streams of protons move parallel to each other in the same direction.
So, we can assume that they are two wires carrying current in same direction.
We know that two parallel wires having same direction of current attract each other.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The resistance of a galvanometer is 50 ohms and the current required to give full scale deflection is 100μA. In order to convert it into an ammeter, reading upto 10A, it is necessary to put a resistance of
|
(a) 5 |
(b) 5 |
|
(c) |
(d) 99,950 |
When wavelength of incident photon is decreased then
|
(a) Velocity of emitted photo-electron decreases |
|
(b) Velocity of emitted photoelectron increases |
|
(c) Velocity of photoelectron do not charge |
|
(d) Photo electric current increases |
A positively charged ball hangs from a silk thread. We put a positive test charge
at a point and measure F/
, then it can be predicted that the electric field strength E
|
(a) |
(b) |
(c) |
(d) Cannot be estimated |
A man standing in a swimming pool looks at a stone lying at the bottom. The depth of the swimming pool is h. At what distance from the surface of water is the image of the stone formed (Line of vision is normal; Refractive index of water is n)
|
(a) h/n |
(b) n/h |
(c) h |
(d) hn |
In the given circuit, it is observed that the current I is independent of the value of the resistance R6. Then the resistance values must satisfy
|
(a) |
(b) |
|
(c) |
(d) |
Antiparticle of electron is
|
(a) |
(b) |
(c) Positron |
(d) Neutrino |
An electromagnetic wave, going through vacuum is described by
. Which of the following is independent of wavelength
| (a) k | (b) w | (c) k/w | (d) kw |
Least doped region in a transistor
|
(a) Either emitter or collector |
(b) Base |
(c) Emitter |
(d) Collector |