JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
A rectangular coil (Dimension \(5\,cm\times 2\,cm\) ) with \(100\,turns,\) carrying a current of \(3\,A\) in the clock-wise direction, is kept centered at the origin and in the \(X-Z\) plane. A magnetic field of \(1\,T\) is applied along \(X-\) axis. If the coil is tilted through \(45^o\) about \(Z-\) axis, then the torque on the coil is.....\(Nm\)
- A \(0.42\)
- B \(0.27\)
- C \(0.55\)
- D \(0.38\)
Answer & Solution
Correct Answer
(B) \(0.27\)
Step-by-step Solution
Detailed explanation
\(|\overrightarrow{\mathrm{t}}|=|\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}|\) \(\tau=\mathrm{NI} \times \mathrm{A} \times \mathrm{B} \times \sin 45^{\circ}\) \(\tau=0.27\, \mathrm{Nm}\)
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 capacitor of capacitance \(C=1\, \mu \,{F}\) is suddenly connected to a battery of \(100\, volt\) through a resistance \({R}=100\, \Omega\). The time taken for the capacitor to be charged to get \(50 \,{V}\) is \(....\,\times \,10^{-4}\,s.\) [Take \(\ln 2=0.69]\)
JEE Mains 2021 Medium - In the given figure the total charge stored in the combination of capacitors is \(100\,\mu C\). The value of ' \(x\) ' is \(............\).
JEE Mains 2023 Medium - The threshold frequency of a metal with work function \(6.63\ \mathrm{eV}\) is:JEE Mains 2024 Hard
- A cylinder of mass \(M_c\) and sphere of mass \(M_s\) are placed at points \(A\) and \(B\) of two inclines, respectively (See Figure). If they roll on the incline without sipping such that their accelerations are the same, then the ratio \(\frac{{\sin \,{\theta _c}}}{{\sin \,{\theta _s}}}\) is
JEE Mains 2014 Hard - A concave mirror produces an image of an object such that the distance between the object and image is 20 cm . If the magnification of the image is ' -3 ', then the magnitude of the radius of curvature of the mirror is :JEE Mains 2025 Easy
- For \(a\) gas \(C_{p}-C_{V}=R\) in a state \(P\) and \(C_{p}-C_{V}=1.10 R\) in a state \(Q, T_{p}\) and \(T_{Q}\) are the temperatures in two different states \(P\) and \(Q\) respectively. ThenJEE Mains 2021 Medium
More PYQs from JEE Mains
- Two sources of sound \(S_1\) and \(S_2\) produce sound waves of same frequency \(660\, Hz\). A listener is moving from source \(S_1\) towards \(S_2\) with a constant speed \(u\, m/s\) and he hears \(10\, beats/s\). The velocity of sound is \(330\, m/s\). Then, \(u\) equals ... \(m/s\)JEE Mains 2019 Medium
- Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following (Assume negligible air friction)JEE Mains 2023 Medium
- Let \(g(x)=3 f\left(\frac{x}{3}\right)+f(3-x)\) and \(f^{\prime \prime}(x)>0\) for all \(\mathrm{x} \in(0,3)\). If \(\mathrm{g}\) is decreasing in \((0, \alpha)\) and increasing in \((\alpha, 3)\), then \(8 \alpha\) isJEE Mains 2024 Hard
- Let \(z _{1}\) and \(z _{2}\) be two complex numbers such that \(\overline{ z }_{1}=i \overline{ z }_{2}\) and \(\arg \left(\frac{ z _{1}}{\overline{ z }_{2}}\right)=\pi\). ThenJEE Mains 2022 Medium
- The value of the integral \(\displaystyle\int_{\pi/6}^{\pi/3} \left(\dfrac{4 - \csc^2 x}{\cos^4 x}\right) dx\) is:JEE Mains 2026 Hard
- An electron revolves around an infinite cylindrical wire having uniform linear change density \(2 \times 10^{-8}\,Cm ^{-1}\) in circular path under the influence of attractive electrostatic field as shown in the figure. The velocity of electron with which it is revolving is \(.........\times 10^6\,ms ^{-1}\). Given mass of electron \(=9 \times 10^{-31}\,kg\)
JEE Mains 2023 Medium