MHT CET · Physics · Electromagnetic Induction
The mutual inductance of two coils is 45 mH . The self-inductance of the coils are \(\mathrm{L}_1=75 \mathrm{mH}\) and \(L_2=48 \mathrm{mH}\). The coefficient of coupling between the two coils is
- A 0.3
- B 0.4
- C 0.75
- D 1
Answer & Solution
Correct Answer
(C) 0.75
Step-by-step Solution
Detailed explanation
Mutual inductance due to two coils,
\(\begin{aligned}
& M=K \sqrt{L_1 L_2} \\
\therefore \quad K & =\frac{M}{\sqrt{L_1 L_2}}=\frac{45}{\sqrt{75 \times 48}}=\frac{45}{60}=0.75
\end{aligned}\)
\(\begin{aligned}
& M=K \sqrt{L_1 L_2} \\
\therefore \quad K & =\frac{M}{\sqrt{L_1 L_2}}=\frac{45}{\sqrt{75 \times 48}}=\frac{45}{60}=0.75
\end{aligned}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A driver applies the brakes on seeing the red traffic single \(400 \mathrm{~m}\) ahead. At the time of applying the brakes, the vehicle was moving with \(15 \mathrm{~m} / \mathrm{s}\) and retarding at \(0.3 \mathrm{~m} / \mathrm{s}^2\). The distance covered by the vehicle from the traffic light 1 minute after the application of brakes isMHT CET 2021 Medium
- Let force \(F=A \sin (C t)+B \cos (D x)\) where \(x\) and \(t\) are displacement and time respectively. The dimensions of \(\frac{\mathrm{C}}{\mathrm{D}}\) are same as dimensions ofMHT CET 2020 Easy
- If the magnitude of intensity of electric field at a distance ' \(\mathrm{r}_1\) ' on an axial line and at a distance ' \(r_2\) ' on an equatorial line due to a given short dipole are equal, then \(r_1: r_2\), isMHT CET 2023 Medium
- Two tuning forks of frequencies 256 Hz and 258 Hz are sounded together. The time interval between two consecutive maxima isMHT CET 2025 Easy
- When the two inputs of a NAND gate are shorted, the resulting gate isMHT CET 2008 Medium
- Refractive index of a glass convex lens is 1.5 . The radius of curvature of each of the two surfaces of the lens is \(20 \mathrm{~cm}\). The ratio of the power of the lens when immersed in a liquid of refractive index 1.25 to that when placed in air isMHT CET 2023 Medium
More PYQs from MHT CET
- Let \(\mathrm{L}_1: \frac{x+1}{3}=\frac{y+2}{1}=\frac{\mathrm{z}+1}{2}\) and
\(\mathrm{L}_2: \frac{x-2}{1}=\frac{y+2}{2}=\frac{z-3}{3}\)
be two given lines. Then the unit vector perpendicular to \(L_1\) and \(L_2\) isMHT CET 2024 Easy - A sonometer wire is in unison with a tuning fork of frequency ' \(n\) ' when it is stretched by a weight of specific gravity ' \(d\) '. When the weight is completely immersed in water, ' \(x\) ' beats are produced per second, thenMHT CET 2024 Hard
- If instantaneous rate of reaction is given as the reaction is represented as,MHT CET 2024 Easy
- Which of the following molecules consist minimum lone pair of electrons in the valence shell of central atom?MHT CET 2025 Easy
- A tuning fork ' \(A\) ' produces 5 beats per second with a tuning fork of frequency 480
\(\mathrm{Hz}\). When a little wax is stuck to a prong of fork \(\mathrm{A}\), the number of beats heard per
second becomes \(2 .\) What is the frequency of tuning fork \(\mathrm{A}\) before the wax is stuck
to it?MHT CET 2020 Medium - Which of the following orbitals is represented by \(\mathrm{n}=3\) and \(l=2\) ?MHT CET 2024 Easy