Two short magnets placed along the same axis with their like poles facing each other repel each other with a force which varies inversely as
| (a) Square of the distance | (b) Cube of the distance |
| (c) Distance | (d) Fourth power of the distance |
Two short magnets placed along the same axis with their like poles facing each other repel each other with a force which varies inversely as
| (a) Square of the distance | (b) Cube of the distance |
| (c) Distance | (d) Fourth power of the distance |
(d) Fourth power of the distance
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Momentum of a photon of wavelength l is
|
(a) |
(b) Zero |
(c) |
(d) |
Wavefront means
|
(a) All particles in it have same phase |
|
(b) All particles have opposite phase of vibrations(c) Few particles are in same phase, rest are in opposite phase |
|
(c) Few particles are in same phase, rest are in opposite phase |
|
(d) None of these |
What should be the current in a circular coil of radius 5cm to annul
|
(a) 0.4 A |
(b) 4 A |
(c) 40 A |
(d) 1 A |
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 |
$\frac{1}{\text{r}}$
$\frac{1}{\text{r}^2}$
$\frac{1}{\text{r}^3}$
None of these.