Two free parallel wires carrying currents in opposite direction
| (a) Attract each other |
| (b) Repel each other |
| (c) Neither attract nor repel |
| (d) Get rotated to be perpendicular to each other |
Two free parallel wires carrying currents in opposite direction
| (a) Attract each other |
| (b) Repel each other |
| (c) Neither attract nor repel |
| (d) Get rotated to be perpendicular to each other |
(b) Repel each other
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According to the pulsating theory the expansion and contraction of the universe repeats after every
|
(a) 11 years |
(b) 8 billion years |
(c) 8 million years |
(d) 80 billion years |
Assertion : The specific charge of positive rays is not constant.
Reason : The mass of ions varies with speed.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |

The bottom of a container filled with liquid appear slightly raised because of
|
(a) Refraction |
(b) Interference |
(c) Diffraction |
(d) Reflection |
The example of nuclear fusion is
|
(a) Formation of barium and krypton from uranium |
|
(b) Formation of helium from hydrogen |
|
(c) Formation of plutonium 235 from uranium 235 |
|
(d) Formation of water from hydrogen and oxygen |
A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current I passes through the coil, the magnetic field at the centre is
|
(a) |
(b) |
(c) |
(d) |
How should people wearing spectacles work with a microscope
|
(a) They cannot use the microscope at all |
(b) They should keep on wearing their spectacles |
|
(c) They should take off spectacles |
(d) (b) and (c) is both way |