MHT CET · Physics · Magnetic Effects of Current
The magnetic moment of a current (I) carrying circular coil of radius ' \(r\) ' and number of turns ' \(n\) ' depends on
- A n only
- B I only
- C \(r\) only
- D n, I and r
Answer & Solution
Correct Answer
(D) n, I and r
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \mathrm{m}=\mathrm{nI} A \\ & \mathrm{~m}=\mathrm{nl}\left(\pi \mathrm{r}^2\right)\end{aligned}\)
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
- The wavelength of sound in any gas depends uponMHT CET 2021 Easy
- Choose the CORRECT statement from the following.
(b)ewster's angle for a transparent medium isMHT CET 2020 Easy - A car sounding a horn of frequency 1200 Hz passes a stationary observer. The ratio of frequencies of the horn noted by the observer before and after passing the car is \(7: 5\). If the speed of sound is ' \(V\) ', the speed of the car isMHT CET 2025 Medium
- The maximum wavelength of radiation emitted by a star is 289.8 nm. Then intensity of radiation for the star is (Given : Stefan’s constant = , Wien’s constant,MHT CET 2019 Medium
- A current 'I' flows in anticlockwise direction in a circular arc of a wire having \(\left(\frac{3}{4}\right)^{\text {th }}\) of circumference of a circle of radius R. The magnetic field ' \(B\) ' at the centre of circle is ( \(\mu_0=\) permeability of free space)MHT CET 2024 Medium
- The Boolean expression for 'XOR' gate \(C=(A \oplus B)\) is equal toMHT CET 2024 Easy
More PYQs from MHT CET
- The telescopes, for a given wavelength, the objectives with large aperture are used forMHT CET 2024 Easy
- The number of all values of \(\theta\) in the interval \(\left(-\frac{\pi}{2}, \frac{\pi}{2}\right)\) satisfying the equation
\((1-\tan \theta)(1+\tan \theta) \sec ^2 \theta+2 \tan ^2 \theta=0\) isMHT CET 2024 Hard - Let
Statement 1 : If a quadrilateral is a square, then all of its sides are equal.
Statement 2: All the sides of a quadrilateral are equal, then it is a square.MHT CET 2023 Easy - What is the standard potential of cell \(\mathrm{Ni}\left|\mathrm{Ni}^{2+}{ }_{(1 \mathrm{M})} \| \mathrm{Cu}^{2+}{ }_{(1 \mathrm{M})}\right| \mathrm{Cu}\) If \(\mathrm{E}^{\circ} \mathrm{Cu}=0 \cdot 337 \mathrm{~V}\) and \(\mathrm{E}^{\circ} \mathrm{Ni}=-0 \cdot 236 \mathrm{~V}\)MHT CET 2020 Medium
- If \(x y=\tan ^{-1}(x y)+\cot ^{-1}(x y)\), then \(\frac{d y}{d x}\) is equal
toMHT CET 2009 Easy - Which of the following are objections to root pressure theory of ascent of sap in plants?
I. It is not applicable to plants taller than 20 meters.
II. Ascent of sap occurs even in the absence of root system.
III. Root pressure is almost zero in tall gymnosperms.
IV. Root pressure is the only mechanism explaining ascent of sap.
V. Root pressure is not developed in actively transpiring plants.
Choose the correctMHT CET 2025 Medium