- APotential energy at that point.
- BElectric field at that point.
- CElectric potential at that point.
- DNone.
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The diameter of each plate of an air capacitor is 4 cm. To make the capacity of this plate capacitor equal to that of 20 cm diameter sphere, the distance between the plates will be
|
(a) 4 |
(b) 1 |
(c) 1 cm |
(d) 1 |
The potential gradient along the length of a uniform wire is 10 volt/metre. B and C are the two points at 30 cm and 60 cm point on a meter scale fitted along the wire. The potential difference between B and C will be
|
(a) 3 volt |
(b) 0.4 volt |
(c) 7 volt |
(d) 4 volt |
A point object is placed at a distance of 30cm from a convex mirror of focal length 30cm. The image will form at:
Three charges 2q, -q, -q are located at the vertices of an equilateral triangle. At the centre of the triangle
|
(a) The field is zero but potential is non-zero |
(b) The field is non-zero but potential is zero |
|
(c) Both field and potential are zero |
(d) Both field and potential are non-zero |
A 10 μF capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt. The capacitance of second capacitor is
|
(a) 10 μF |
(b) 20 μF |
(c) 30 μF |
(d) 15 μF |
In the given nuclear reaction, how many a and b particles are emitted
|
(a) 3a particles and 2b particle |
(b) 4a particles and 3b particle |
|
(c) 6a particles and 4b particle |
(d) 7a particles and 4b particle |