MCQ
Mutual inductance of two coils can be increased by
- ADecreasing the number of turns in the coils
- ✓Increasing the number of turns in the coils
- CWinding the coils on wooden core
- DNone of the above
✓
Answer
Correct option: B.
Increasing the number of turns in the coils
b
(b) Mutual inductance of coils,
(b) Mutual inductance of coils,
$M=\frac{\mu_{0} \mu_{r} N_{1} N_{2} A}{l}$
It is clear that mutual inductance or coils can be increased by increasing the number of turns in the coils
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In an ideal parallel $LC$ circuit, the capacitor is charged by connecting it to a $D.C.$ source which is then disconnected. The current in the circuit.
→A $4\ \mu F$ capacitor, a resistance of $2.5 \,MW$$\Omega$ is in series with $12\, V$ battery. Find the time after which the potential difference across the capacitor is $3$ times the potential difference across the resistor.......$s$ [Given $ln(2)= 0.693$]
→An excited $He^+$ ion emits two photons in succession, with wavelengths $108.5\, nm$ and $30.4\, nm$, in making a transition to ground state. The quantum number $n$, corresponding to its initial excited state is $n=........$ (for photon of wavelength $\lambda $, energy $E = \frac{{1240\,eV}}{{\lambda \,(in\,nm)}}$)
→Which of the following pairs of physical quantities may be represented in the same unit?
A small, conducting circular loop is placed inside a long solenoid carrying a current. The plane of the loop contains the axis of the solenoid. If the current in the solenoid is varied, the current induced in the loop is:
In X-ray tube when the accelerating voltage V is halved, the difference between the wavelength of $\mathrm{K}_a$ line and minimum wavelength of continuous X-ray spectrum
→At what distance from a convex lens of focal length $30 cm$, an object should be placed so that the size of the image be $1/2$ of the object......$ cm$
→There is a uniform magnetic field $B$ normal to the $xy$ plane. $A$ conductor $ABC$ has length $AB = l_1$, parallel to the $x$ -axis, and length $BC = l_2$, parallel to the $y$ -axis. $ABC$ moves in the $xy$ plane with velocity ${v_x}\hat i + {v_y}\hat j$. The potential difference between $A$ and $C$ is proportional to
→If $N _{ p }$ and $N _{ e }$ be the numbers of holes and conduction electrons in an extrinsic semiconductor, then
→Complete the following statement. For electromagnetic induction to occur: