COMEDK · Physics · 21. Magnetic Effects of Current
Three long straight wires \(A, B\) and \(C\) are carrying currents as shown in figure. Then, the resultant force on \(B\) is directed
- A towards \(A\)
- B towards \(C\)
- C perpendicular to the plane of paper and outward
- D perpendicular to the plane of paper and inward
Answer & Solution
Correct Answer
(B) towards \(C\)
Step-by-step Solution
Detailed explanation
Magnetic field at any point due to a straight current carrying wire is given by \[ B=\frac{\mu_{0} I}{2 \pi d} \] where, \(d\) is the distance of the point from the wire and \(I_{1}\) is current flowing in the wire. Force due to this magnetic field on current carrying wire is…
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 maximum current that can be measured by a galvanometer of resistance \(40 \Omega\) is \(10 \mathrm{~mA}\). It is converted into a voltmeter that can read upto \(50 \mathrm{~V}\). The resistance to be connected in series with the galvanometer (in ohm) isCOMEDK 2019 Medium
- Two protons are kept at a separation of \(40 Å . F_{n}\) is the nuclear force and \(F_{e}\) is the electrostatic force between them. Then,COMEDK 2018 Easy
- To get 300 MW electric power for half an hour, how much mass is to be completely converted into energy?COMEDK 2025 Medium
- A body is projected vertically upwards. The times corresponding to height \(h\), while ascending and descending are \(t_{1}\) and \(t_{2}\), respectively. Then, the velocity of projection is ( \(g\) is acceleration due to gravity)COMEDK 2018 Easy
- The difference between the wavelengths of the stokes line and anti-stokes lines in the Raman spectrum of H-Br molecule is \(100 Å\). If the wavelength of the anti-stokes line is \(5000 Å\), then the wavelength of the incident radiation isCOMEDK 2012 Hard
- \(90 \mathrm{~dB}\) sound is \(x\) times more intense than \(40 \mathrm{~dB}\) sound, then \(x\) isCOMEDK 2016 Medium
More PYQs from COMEDK
- The current drawn from the battery by the network of resistors as shown in the figure is
COMEDK 2024 Medium - If \(f(x+y)=f(x) f(y)\) for all \(x\) and \(y\) and \(f(5)=2, f^{\prime}(0)=3\), then \(f^{\prime}(5)\) isCOMEDK 2015 Easy
- If four digit number is formed using the digit 0 , \(1,2,3\) with no repetition. Then the probability that the number is both even and divisible by 3 isCOMEDK 2024 Medium
- A bar magnet of length 12 cm is placed such that its north pole points towards the geographic north. Two neutral points which are separated by 16 cm are obtained on the equatorial axis of the bar magnet. What is the pole strength of the bar magnet if the horizontal component of the earth's field is \(1.25 \times 10^{-5}\ T\)?COMEDK 2026 Medium
- A compound is formed by elements \(A\) and \(B\). This crystallises in the cubic structure, where the \(A\) atoms are at the corners of the cube and \(B\) atoms are at the body centres.COMEDK 2017 Easy
- Two very long, straight, parallel wires carry steady currents I and 2I respectively. The distance between the wires is d. At a certain instant of time, a point charge q is at a point equidistant from the two wires, in the plane of the wires. Its instantaneous velocity is v perpendicular to this plane. The magnitude of the force due to the magnetic field acting on the charge at this instant isCOMEDK 2025 Medium