A parallel plate capacitor is connected to a battery. The plates are pulled apart with a uniform speed. If x is the separation between the plates, the time rate of change of electrostatic energy of capacitor is proportional to
|
(a) x–2 |
(b) x |
(c) x–1 |
(d) x2 |
(a) x–2
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$\frac{1}{2}\overrightarrow{\text{a}}$
$\overrightarrow{\text{a}}$
$2\overrightarrow{\text{a}}$
A element used for radioactive carbon dating for more than 5600 years is
|
(a) C - 14 |
(b) U - 234 |
(c) U - 238 |
(d) Po - 94 |
The dielectric constant k of an insulator cannot be
|
(a) 3 |
(b) 6 |
(c) 8 |
(d) ∞ |
With respect to air critical angle in a medium for light of red colour [
is q. Other facts remaining same, critical angle for light of yellow colour [
] will be
|
(a) θ |
(b) More than θ |
(c) Less than θ |
(d) |
A charge of 40 μC is given to a capacitor having capacitance C = 10 μF. The stored energy in ergs is
|
(a) 80 |
(b) 800 |
(c) 80 |
(d) 8000 |
