AP EAMCET · PHYSICS · Magnetic Effects of Current
Two concentric coils of 10 turns each are placed in the same plane. Their radii are \(20 \mathrm{~cm}\) and \(40 \mathrm{~cm}\) and carry 0.2 and \(0.3 \mathrm{~A}\). current respectively in opposite directions. The magnetic induction (in T) at the centre is
- A \(\frac{3}{4} \mu_0\)
- B \(\frac{5}{4} \mu_0\)
- C \(\frac{7}{4} \mu_0\)
- D \(\frac{9}{4} \mu_0\)
Answer & Solution
Correct Answer
(B) \(\frac{5}{4} \mu_0\)
Step-by-step Solution
Detailed explanation
Two coils carry currents in opposite directions, hence net magnetic field at centre will be difference of the two fields. ie,…
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 amplitude of a damped harmonic oscilator becomes \(50 \%\) of its initial value in a time of 12 s. If the amplitude of the oscillator at a time of 36 s is \(\mathrm{x} \%\) of its initial amplitude, then the value of \(x\) isAP EAMCET 2025 Medium
- A motor boat is moving in a river with velocity \(\overrightarrow{\mathrm{v}}=7 \hat{\mathrm{i}}+2 \hat{\mathrm{j}}-5 \hat{\mathrm{k}} \mathrm{ms}^{-1}\). If the flow of water offers resistive force \(\vec{F}=9 \hat{i}+3 \hat{j}-3 \hat{k} \quad N\), then the power of the boat isAP EAMCET 2023 Easy
- A body is projected at an angle of \(60^{\circ}\) with the horizontal. If the initial kinetic energy of the body is X, then its kinetic energy at the highest point isAP EAMCET 2025 Medium
- A horizontal board is performing simple harmonic oscillations horizontally with an amplitude 0.3 m and a period of 4 s . The minimum coefficient of friction between a heavy body placed on the board if the body is not to slip is.AP EAMCET 2024 Hard
- When \(\mathrm{A}=0\) and \(\mathrm{B}=1\), the output is 0 forAP EAMCET 2023 Easy
- A disc of mass 0.2 kg is kept floating in air without falling by vertically firing bullets each of mass 0.05 kg on the disc at the rate of 10 bullets per every second. If the bullets rebound with the same speed, then the speed of each bullet is \(\left(\right.\) Acceleration due to gravity \(\left.=10 \mathrm{~ms}^{-2}\right)\)AP EAMCET 2025 Medium
More PYQs from AP EAMCET
- If the increase in the side of square is \(6 \%\), then the approximate percentage increase in its area ......AP EAMCET 2020 Easy
- The coefficient of \(x^n\) in \(\frac{1-2 x}{e^x}\) is :AP EAMCET 2006 Medium
- \(\int_0^2 x^8\left(\frac{4}{x^2}-1\right)^{5 / 2} d x=\)AP EAMCET 2025 Medium
- If \(\int_3^b \frac{x-1}{2 x-x^2} d x=\frac{1}{2}\), then \((b-1)^2=\)AP EAMCET 2023 Hard
- If \(x=a(t+\sin t)\) and \(y=a(1-\cos t)\), then \(\frac{d^2 y}{d x^2}\)AP EAMCET 2018 Easy
- Assertion (A)
\(\text { (I) }+(1+2+4)+(4+6+9) +(9+12+16)+\ldots+(81+90+100)=1000\)
Reason (R) \(\sum_{r=1}^n\left(r^3-[r-1]^3\right)=n^3\) for any natural number \(n\)AP EAMCET 2019 Medium