MCQ
Average energy stored in a pure inductance $L$ when a current $i$ flows through it, is
  • A
    $\mathrm{Li}^2$
  • B
    $2 \mathrm{Li}^2$
  • C
    $\frac{\mathrm{Li}^2}{4}$
  • $\frac{\mathrm{Li}^2}{2}$

Answer

Correct option: D.
$\frac{\mathrm{Li}^2}{2}$
$\frac{\mathrm{Li}^2}{2}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Two points A and B are situated at a distance x and 2x respectively from the nearer pole of a magnet 2cm long. The ratio of magnetic field at A and B is:
A beam of plane polarized light falls normally on a polarizer of cross sectional area $3 \times 10^{-4} \mathrm{~m}^2$
Flux of energy of incident ray in $10^{-3} \mathrm{~W}$. The polarizer rotates with an angular frequency of $31.4 \ \mathrm{rad} / \mathrm{sec}$. The energy of light passing through the polarizer per revolution will be
A $5.0$ amp current is setup in an external circuit by a $6.0$ volt storage battery for $6.0$ minutes. The chemical energy of the battery is reduced by
In the following star circuit diagram $($figure$),$ the equivalent resistance between the points $A$ and $H$ will be
A freshly prepared radioactive source of half life 2 hr emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is:
A hydrogen atom in its ground state absorbs $10.2\ eV$ of energy. The orbital angular momentum is increased by
In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is(a) It is a lubricant (b) Its density is higher(c) It vapourises easily(d) It does not vapourise
   
   
If an object is placed 10 cm infront of a concave mirror of focal length 20 cm, the image will be (a) Diminished, upright, virtual(b) Enlarged, upright, virtual(c) Diminished, inverted, real(d) Enlarged, upright, real
   
   
The error in measuring the current with a tangent galvanometer is minimum when the deflection is about
There are two electric bulbs of 40 W and 100 W. Which one will be brighter when first connected in series and then in parallel,(a) 40 W in series and 100 W in parallel(b) 100 W in series and 40 W in parallel(c) 40 W both in series and parallel will be uniform(d) 100 W both in series and parallel will be uniform