Explanation:
When two conductors carrying equal current both the conductor experiences a force which is perpendicular to the wire and are equal.
Since both these forces are equal and towards each other, both the current carrying wire will be repelling each other.
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The value of plate current in the given circuit diagram will be
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(a) 3 mA |
(b) 8 mA |
(c) 13 mA |
(d) 18 mA |
In Young’s double slit experiment, the central bright fringe can be identified
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(a) By using white light instead of monochromatic light |
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(b) As it is narrower than other bright fringes |
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(c) As it is wider than other bright fringes |
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(d) As it has a greater intensity than the other bright fringes |
If a diamagnetic solution is poured into a U-tube and one arm of this U-tube placed between the poles of a strong magnet with the meniscus in a line with the field, then the level of the solution will
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(a) Rise |
(b) Fall |
(c) Oscillate slowly |
(d) Remain as such |
Two identical magnetic dipoles of magnetic moments 1.0 A-m2 each, placed at a separation of 2m with their axis perpendicular to each other. The resultant magnetic field at a point midway between the dipoles is
(a) 5 
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(b) 
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(c)
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(d) None of these |
Given three equal resistors, how many different combination of all the three resistors can be made
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(a) Six |
(b) Five |
(c) Four |
(d) Three |
When a plane polarised light is passed through an analyser and analyser is rotated through 90°, the intensity of the emerging light
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(a) Varies between a maximum and minimum |
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(b) Becomes zero |
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(c) Does not vary |
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(d) Varies between a maximum and zero |
The capacity of a parallel plate capacitor increases with the
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(a) Decrease of its area |
(b) Increase of its distance |
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(c) Increase of its area |
(d) None of the above |