Question:

A long straight wire carries 10 Ad.cA \,d.c. current an electron travels perpendicular to the plane of this wire at a distance 0.1m0.1\, m with velocity 5.0×106ms15.0 \times10^6 m \,s^{-1}. Force acting on the electron due to current in wire is

Updated On: Mar 15, 2024
  • zero N
  • 0.6×1017N0.6 \times10^{-17} N
  • 2.4×1017N2.4 \times10^{-17} N
  • 2.2×1017N2.2 \times10^{-17} N
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is A

Solution and Explanation

Force on the electron F=e(v×B)\vec{F}=-e\left(\vec{v} \times\vec{B}\right). As electron is travelling in a plane perpendicular to the plane of wire, so angle ? between v\vec{v} and B\vec{B} is either 0^{\circ} or 180^{\circ} and sin 0^{\circ} or sin 180^{\circ} = 0.
Was this answer helpful?
0
1

Top Questions on Moving charges and magnetism

View More Questions

Questions Asked in AIIMS exam

View More Questions

Concepts Used:

Moving Charges and Magnetism

Moving charges generate an electric field and the rate of flow of charge is known as current. This is the basic concept in Electrostatics. Another important concept related to moving electric charges is the magnetic effect of current. Magnetism is caused by the current.

Magnetism:

  • The relationship between a Moving Charge and Magnetism is that Magnetism is produced by the movement of charges.
  • And Magnetism is a property that is displayed by Magnets and produced by moving charges, which results in objects being attracted or pushed away.

Magnetic Field:

Region in space around a magnet where the Magnet has its Magnetic effect is called the Magnetic field of the Magnet. Let us suppose that there is a point charge q (moving with a velocity v and, located at r at a given time t) in presence of both the electric field E (r) and the magnetic field B (r). The force on an electric charge q due to both of them can be written as,

F = q [ E (r) + v × B (r)] ≡ EElectric +Fmagnetic 

This force was based on the extensive experiments of Ampere and others. It is called the Lorentz force.