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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$\frac{\lambda}{4}$
$\frac{\lambda}{3}$
$\frac{\lambda}{2}$
$\lambda.$
Energy of 1g uranium is equal to
|
(a) 9.0 |
(b) 9.0 |
(c) 3.0 |
(d) 3.0 |
$\frac{1}{2}\text{m}\omega^2\text{A}^2$
$\frac{1}{4}\text{m}\omega^2\text{A}^2$
$\text{m}\omega^2\text{A}^2$
$\text{Zero}$
Which of the following, the most suitable material for making permanent magnet is
|
(a) Steel |
(b) Soft iron |
(c) Copper |
(d) Nickel |
The unit of inductance is
|
(a) Volt/ampere |
(b) Joule/ampere |
(c) Volt-sec/ampere |
(d) Volt-ampere/sec |
In a radioactive decay, neither the atomic number nor the mass number changes. Which of the following would be emitted in the decay process
|
(a) Proton |
(b) Neutron |
(c) Electron |
(d) Photon |
The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The dc component of the output voltage is
|
(a) 10/ |
(b) 10/p V |
(c) 10 V |
(d) 20/p V |
