- ANature of medium
- BSystem of units
- CIntensity of charge
- DBoth (a) and (b)
Explanation:
The value of $\text{K}=\frac{1}{4\pi\in_0}=8.854\times10^{-12}\text{C}^2\text{N}^{-1}\text{m}^{-2}$
Where ε0 is permittivity of free space.
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Assertion : When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur.
Reason : Some energy disappears in the form of heat, sparking etc.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
The voltage V and current I graph for a conductor at two different temperatures and
are shown in the figure. The relation between
and
is
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(a) |
(b) |
(c) |
(d) |
A parallel plate capacitor of plate area A and plate separation d is charged to potential V and then the battery is disconnected. A slab of dielectric constant k is then inserted between the plates of the capacitors so as to fill the space between the plates. If Q, E and W denote respectively, the magnitude of charge on each plate, the electric field between the plates (after the slab is inserted) and work done on the system in question in the process of inserting the slab, then state incorrect relation from the following
|
(a) |
(b) |
(c) |
(d) |
A copper wire of resistance R is cut into ten parts of equal length. Two pieces each are joined in series and then five such combinations are joined in parallel. The new combination will have a resistance
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(a) R |
(b) |
(c) |
(d) |

Which of the following rays are not electromagnetic waves
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(a) g-rays |
(b) b-rays |
(c) Heat rays |
(d) X-rays |
The shortest wavelength in the Lyman series of hydrogen spectrum is 912 Å corresponding to a photon energy of 13.6 eV. The shortest wavelength in the Balmer series is about
| (a) 3648 Å | (b) 8208 Å | (c) 1228 Å | (d) 6566 Å |