MCQ
Two circular coils have their centres at the same point. The mutual inductance between them will be maximum when their axes
  • Are parallel to each other
  • B
    Are at $60^\circ$ to each other
  • C
    Are at $45^\circ$ to each other
  • D
    Are perpendicular to each other

Answer

Correct option: A.
Are parallel to each other
Are parallel to each other

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

An electron is accelerated through a $p.d.$ of $ 45.5$ volt. The velocity acquired by it is (in $ms^{-1}$)
If some charge is given to a solid metallic sphere, the field inside remains zero and by Gauss's law all the charge resides on the surface. Now, suppose that Coulomb's force between two charges varies as $1 / r^{3}$. Then, for a charged solid metallic sphere
A moving conductor coil in a magnetic field produces an induced e.m.f. This is in accordance with
For a common base amplifier, the values of resistance gain and voltage gain are $3000$ and $2800$ respectively. The current gain will be:
The wavelength of light used in an optical instrument is $\lambda_1=4000 Å$ and $\lambda_2=5000 Å$. The ratio of their corresponding resolution powers will be :
A radioactive sample has $\mathrm{N}_0$ active atoms at t = 0. If the rate of disintegration at any time is R and the number of atoms is N, then the ratio R/N varies with time as
An air core solenoid has $1000$ turns and is one metre long. Its cross-sectional area is $10$ $cm$$^2$. Its self inductance is
Assertion : In Lyman series, the ratio of minimum and maximum wavelength is $\frac{3}{4}$.

Reason : Lyman series constitute spectral lines corresponding to transition from higher energy to ground state of hydrogen atom.

When light is incident on a medium at angle i and refracted into a second medium at an angle $ r$, the graph of $sin\, i $ vs $sin\,r $ is as shown in the graph. From this, one can conclude that
Two parallel large thin metal sheets have equal surface charge densities $(\sigma = 26.4 \times 10^{-12}\,c/m^2)$ of opposite signs. The electric field between these sheets is