- AIron
- BCobalt
- CCopper
- DNickel
Explanation:
A magnet is a material that has both attractive and directive properties. It attracts small pieces of iron, nickel, cobalt, etc. This property of attraction is called magnetism. Going by this criteria, copper is not attracted by magnets.
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Two capacitors and
in series, are connected in parallel to a third capacitor
. This arrangement is then connected to a battery of e.m.f. = 2V, as shown in the figure. How much energy is lost by the battery in charging the capacitors
|
(a) 22 |
(b) 11 |
(c) |
(d) |
A light wave is incident normally over a slit of width 24 . The angular position of second dark fringe from the central maxima is 30o. What is the wavelength of light
|
(a) 6000 Å |
(b) 5000 Å |
(c) 3000 Å |
(d) 1500 Å |
$\frac{\text{mv}^2}{\text{r}}$ must be acting on the central particle.
$\frac{2\text{mv}^2}{\text{r}}$ must be acting on the central particle.
$\frac{2\text{mv}^2}{\text{r}}$ must be acting on the system.
$\frac{2\text{mv}^2}{\text{r}}$ must be acting on the ring.