TS EAMCET · Physics · Magnetic Effects of Current
Two wires \(A\) and \(B\) are of lengths \(40 \mathrm{~cm}\) and \(30 \mathrm{~cm}\). \(A\) is bent into a circle of radius \(r\) and \(B\) into an arc of radius \(r\). A current \(i_1\) is passed through \(A\) and \(i_2\) through \(B\). To have the same magnetic inductions at the centre, the ratio of \(i_1: i_2\) is
- A \(3: 4\)
- B \(3: 5\)
- C \(2: 3\)
- D \(4: 3\)
Answer & Solution
Correct Answer
(A) \(3: 4\)
Step-by-step Solution
Detailed explanation
For wire \(A\), \(B_1=\frac{\mu_0 \dot{l}_1}{2 r}\) where \(r=\frac{40}{2 \pi}\) For wire \(B\), \(\begin{aligned} \text { Circumference } & =\text { length } \\ n \pi r & =30\end{aligned}\) or \(\quad n \pi=\frac{30}{r}=\frac{30}{40 / 2 \pi}=\frac{3}{2} \pi\)…
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 solid cylinder of radius \(r_1=2.5 \mathrm{~cm}\), length \(l_1=5.0 \mathrm{~cm}\) and temperature \(40^{\circ} \mathrm{C}\) is suspended in an environment of temperature \(60^{\circ} \mathrm{C}\). The thermal radiation transfer rate for cylinder is \(1.0 \mathrm{~W}\). If the cylinder is stretched until its radius becomes \(r_2=0.50 \mathrm{~cm}\), the thermal radiation transfer rate is changed toTS EAMCET 2020 Medium
- Two circular coils \(P\) and \(Q\) are made of two identical wires of the same length. The number of turns in the \(P\) and \(Q\) are 4 and 2, respectively. The magnetic inductions at the centre of \(P\) and \(Q\) are \(B_P\) and \(B_Q\), respectively. The ratio \(\frac{B_P}{B_Q}\) isTS EAMCET 2021 Medium
- The band gap in a semi-conductor is \(0.6 \mathrm{eV}\). The maximum wavelength of electromagnetic radiation which can create a hole-electron pair in this semiconductor is equal to [Use \(h c=1242 \mathrm{eV}-\mathrm{nm}\) ]TS EAMCET 2022 Easy
- Select the physical quantities in Column-I and Column-II having same dimensions.
The correct answer is
\(\begin{array}{llll}
\mathbf{A} & \mathbf{B} & \mathbf{C} & \mathbf{D}
\end{array}\)TS EAMCET 2022 Easy - Two identical condensers \(M\) and \(N\) are connected in series with a battery. The space between the plates of \(M\) is completely filled with a dielectric medium of dielectric constant 8 and a copper plate of thickness \(\frac{d}{2}\) is introduced between the plates of \(N\). ( \(d\) is the distance between the plates). Then potential differences across \(M\) and \(N\) are, respectively, in the ratioTS EAMCET 2011 Hard
- Two lenses \(A\) and \(B\) having focal lengths \(2.0 \mathrm{~cm}\) and \(5.0 \mathrm{~cm}\), respectively are placed \(14 \mathrm{~cm}\) apart. Lens \(A\) is placed to the left of lens \(B\). An object is placed \(3 \mathrm{~cm}\) to the left of lens \(A\). The distance of the image from lens \(A\) will beTS EAMCET 2019 Medium
More PYQs from TS EAMCET
- If two soap bubbles of different radii are connected by a tube, thenTS EAMCET 2011 Easy
- Two metal plates each of area ' \(A\) ' form a parallel plate capacitor with air in between the plates. The distance between the plates is ' \(d\) '. A metal plate of thickness \(\frac{d}{2}\) and of same area \(A\) is inserted between the plates to form two capacitors of capacitances \(C_1\) and \(C_2\) as shown in the figure. If the effective capacitance of the two capacitors is \(C^{\prime}\) and the capacitance of the capacitor initially is \(C\), then \(\frac{C^{\prime}}{C}\) is
TS EAMCET 2013 Hard - A particle moves over a plane with a constant acceleration . At the time the velocity is The speed of the particle when it is displaced by parallel to the -axis is,TS EAMCET 2021 Medium
- A planet is revolving around the sun in which of the following is correct statement?
TS EAMCET 2020 Medium - A wire of length \(50 \mathrm{~cm}\) and weighing \(10 \mathrm{gm}\) is attached to a spring at one end and to a fixed wall at the other end. The spring has a spring constant of \(50 \mathrm{~N} / \mathrm{m}\) and is stretched by \(1 \mathrm{~cm}\). If a wave pulse is produced on the string near the wall, then how much time will it take to reach the spring?TS EAMCET 2018 Easy
- An ideal gas in a closed container is heated so that the final rms speed of the gas particles increases by 2 times the initial rms speed. If the initial gas temperature is \(27^{\circ} \mathrm{C}\), then the final temperature of the ideal gas is :TS EAMCET 2019 Easy