- A$V=C Q$
- B$C=V Q$
- ✓$V=\frac{Q}{C}$
- D$Q =\frac{ V }{ C }$
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A current of 10A is passing through a long wire which has semicircular loop of the radius 20cm as shown in the figure. Magnetic field produced at the centre of the loop is

|
(a) 10 πμT |
(b) 5 πμT |
(c) 4 πμT |
(d) 2 πμT |
Figure shows the ray diagram of a:

Decay constant of radium is λ. By a suitable process its compound radium bromide is obtained. The decay constant of radium bromide will be
|
(a) λ |
(b) More than λ |
(c) Less than λ |
(d) Zero |
How much current should be passed through acidified water for 100 s to liberate 0.224 litre of ![]()
|
(a) 22.4 A |
(b) 19.3 A |
(c) 9.65 A |
(d) 1 A |

The radius of hydrogen atom in its ground state is 5.3 . After collision with an electron it is found to have a radius of 21.2
. What is the principal quantum number n of the final state of the atom
|
(a) n = 4 |
(b) n = 2 |
(c) n = 16 |
(d) n = 3 |
Five equal resistances each of value R are connected in a form shown alongside. The equivalent resistance of the network
|
(a) Between the points B and D is R |
(b) Between the points B and D is |
|
(c) Between the points A and C is R |
(d) b, c |