KCET · Physics · Electromagnetic Induction
A rod of length \(2 \mathrm{~m}\) slides with a speed of \(5 \mathrm{~ms}^{-1}\) on a rectangular conducting frame as shown in figure. There exists a uniform magnetic filed of \(0.04 \mathrm{~T}\) perpendicular to the plane of the figure. If the resistance of the rod is \(3 \Omega\). The current through the rod is
- A \(75 \mathrm{~mA}\)
- B \(133 \mathrm{~mA}\)
- C \(0.75 \mathrm{~A}\)
- D \(1.33 \mathrm{~A}\)
Answer & Solution
Correct Answer
(B) \(133 \mathrm{~mA}\)
Step-by-step Solution
Detailed explanation
Given, \(l=2 \mathrm{~m}, v=5 \mathrm{~m} / \mathrm{s}, B=0.04 \mathrm{~T}\) and \(R=3 \Omega\) The current induced in a conducting coil, when moved in a uniform magnetic field is
\(I=\frac{B l v}{R}=\frac{0.04 \times 2 \times 5}{3}=0.133 \mathrm{~A}=133 \mathrm{~mA}\)
\(I=\frac{B l v}{R}=\frac{0.04 \times 2 \times 5}{3}=0.133 \mathrm{~A}=133 \mathrm{~mA}\)
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 \(10 \mu \mathrm{F}\) is charged to \(10 \mathrm{~V}\). The energy stored in it isKCET 2012 Easy
- The total electric flux through a closed spherical surface of radius \(r\) enclosing an electric dipole of dipole moment \(2 a q\) is (Give \(\varepsilon_0=\) permittivity of free space)KCET 2024 Easy
- The efficiency of a Carnot engine which operates between the two temperatures \( T_{1}=500 \mathrm{~K} \)
and \( T_{2}=300 \mathrm{~K} \) isKCET 2015 Medium - During an elastic collision between two bodies, which of the following statements are correct?
I. The initial kinetic energy is equal to the final kinetic energy of the system.
II. The linear momentum is conserved.
III. The kinetic energy during \(\Delta t\) (the collision time) is not conserved.KCET 2025 Easy - In the circuit shown in the figure, the potential difference across the \(4 \mu\text{F}\) capacitor is
KCET 2026 Medium - In Karnataka, the normal domestic power supply AC is \( 220 \mathrm{~V}, 50 \mathrm{~Hz} . \) Here \( 220 \mathrm{~V} \) and \( 50 \mathrm{~Hz} \) refer toKCET 2018 Easy
More PYQs from KCET
- If \( A=\left[\begin{array}{cc}0 & 1 \\ 1 & 0\end{array}\right] \), then \( A^{2} \) equal toKCET 2015 Medium
- Identify \({ }^{\prime} C^{\circ}\) in the following
KCET 2012 Medium - The area bounded by the curve \(y=\sin \left(\frac{x}{3}\right)\), \(x\)-axis and lines \(x=0\) and \(x=3 \pi\) isKCET 2013 Easy
- The magnetic flux linked with a coil varies as \( \phi=3 t^{2}+4 t+9 . \) The magnitude of the emf
induced at \( t=2 \) seconds isKCET 2018 Easy - If \(\frac{(x+1)^{2}}{x^{3}+x}=\frac{A}{x}+\frac{B x+C}{x^{2}+1}\), then \(\sin ^{-1} A+\tan ^{-1} B+\sec ^{-1} C\) is equal toKCET 2013 Easy
- Which of the following does not belong to Kingdom Monera?KCET 2013 Easy