Question
By which different ways can magnetic flux linked with a conducting coil be changed ?
✓
Answer
→Magnetic flux linked with coil,
$\begin{aligned}
\phi_{ B } & = N (\overrightarrow{ B } \cdot \overrightarrow{ A }) \\
& = NBA \cos \theta \\
& = NBA \cos \omega t
\end{aligned}$
→From above equation, it is clear that by making change in any one or more terms out of $N , B$, $\dot{A}$ and $\theta$, magnetic flux can be changed.
→Thus, magnetic flux can be changed -
→ By rotating coil in magnetic field, changing angular speed $(\omega / \theta)$
→ By changing dimensions of conductor (A)
→ By placing coil in magnetic field changing with time. (B)
→By changing number of turns of the coil $( N )$
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
The equation $\omega=\frac{\mu_\text{v}-\mu_\text{r}}{\mu-1}$ asderived for a prism having small refracting angle. Is it also valid for a prism of large refracting angle? Is it also valid for a glass slab or a glass sphere?
→What is magnetic dipole moment? Write its Sl unit and dimensional formula.
Define resolving power of a compound microscope. How does the resolving power of a compound microscope change when.
- refractive index of the medium between the object and objective lens increases?
- wavelength of the radiation used is increased?
A block of mass 0.2kg is suspended from the ceiling by a light string. A second block of mass 0.3kg is suspended from the first block through another string. Find the tensions in the two strings. Take $g = 10m/s^2$.
→A parallel plate capacitor with air between the plates has a capacitance of 8 pF. The separation between the plates is now reduced by half and the space between them is filled with a medium of dielectric constant 5. Calculate the value
of capacitance of the capacitor in the second case.
of capacitance of the capacitor in the second case.
The given inputs A, B are fed to a 2-input NAND gate. Draw the output wave form of the gate.
A parallel plate capacitor is charged with a potential difference 50 V . Thereafter it is discharged by a resistor for 2 sec , due to which its potential decreases by 10 V . Calculate the portion of energy stored in the capacitor.
In Young’s double-slit experiment using monochromatic light of wavelength $\lambda $, the intensities of two sources is I. What is the intensity of light at a point where path difference between wave front is $\lambda / 4$ ?
→Find the value of capacitance between points P and N of the connection shown in the figure when (a) switch S is open, (b) switch S is closed. Here $C =1 \mu F$ and $C _2=2 \mu F$.
→The changes in a function y and the independent dy variable x are related as $\frac{\text{dy}}{\text{dx}}=\text{x}^2.$ Find y as a function of x.
→