- 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.
A parallel plate capacitor has capacitance C. If it is equally filled with parallel layers of materials of dielectric constants K1 and K2 its capacity becomes C1. The ratio of C1 to C is
|
(a) |
(b) |
(c) |
(d) |
Which particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field
|
(a) |
(b) Electron |
(c) Proton |
(d) |
When one of the slits of Young’s experiment is covered with a transparent sheet of thickness 4.8 mm, the central fringe shifts to a position originally occupied by the 30th bright fringe. What should be the thickness of the sheet if the central fringe has to shift to the position occupied by 20th bright fringe
|
(a) 3.8 mm |
(b) 1.6 mm |
(c) 7.6 mm |
(d) 3.2 mm |
Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earth's magnetic field with like poles together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is
| (a) 3 : 1 | (b) 1 : 3 | (c) 3 : 5 | (d) 5 : 4 |
A proton of energy 200 MeV enters the magnetic field of 5 T. If direction of field is from south to north and motion is upward, the force acting on it will be
|
(a) Zero |
(b) 1.6 |
(c) 3.2 |
(d) 1.6 |
Two ends of a conductor are at different temperatures the electromotive force generated between two ends is
|
(a) Seebeck electro motive force (e.m.f.) |
(b) Peltier electro motive force (e.m.f.) |
|
(c) Thomson electro motive force (e.m.f.) |
(d) None of these |
A circular coil ‘A’ has a radius R and the current flowing through it is I. Another circular coil ‘B’ has a radius 2R and if 2I is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e.
to
)
|
(a) 4 : 1 |
(b) 2 : 1 |
(c) 3 : 1 |
(d) 1 : 1 |
The wave theory of light was given by
|
(a) Maxwell |
(b) Planck |
(c) Huygen |
(d) Young |
Two coherent light sources S1 and S2 (l= 6000 Å) are 1mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be
|
(a) 0.015 cm |
(b) 0.025 cm |
(c) 0.010 cm |
(d) 0.030 cm |