Home
Class 12
PHYSICS
A long straight wire carries a current o...

A long straight wire carries a current of 50 A. An electron moving at `10^(7)` m/s is 5 cm away from the wire. The force acting on electron if its velocity is directed towards the wire will be

A

`1.6xx10^-16N`

B

`3.1xx10^-16 N`

C

`4.8xx10^-16N`

D

`1.8xx10^-16N`

Text Solution

Verified by Experts

The correct Answer is:
B
`B=(mu_0I)/(2pi a)`
`F=q v B sin theta , theta =90^@`
`F=q v B = ev B`
`=e V (mu_0I)/(2 pi a)`
` =3.2 xx 10^-16 N`.
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    NIKITA PUBLICATION|Exercise MCQs (Sensitivity and accuracy of M.C.G.)|1 Videos

  • KINETIC THEORY OF GASES & RADIATION

    NIKITA PUBLICATION|Exercise MCQs (Question Given in MHT-CET)|79 Videos

  • MAGNETISM

    NIKITA PUBLICATION|Exercise MCQs|249 Videos

Similar Questions

Explore conceptually related problems

A straight wire carries a current of 10A. An electron moving at 10^(3) m/s is at distance 2.0 cm from the wire. Find the force acting on the electron if its velocity is directed toward the wire?

If a long straight wire carries a current of 40 A, then the magnitude of the field B at a point 15 cm away from the wire is

A long straight wire carries a current of 35 A. What is the magnitude of the field vecB at a point 20 cm from the wire?

A long straight wire carries a current of 35A . What is the magnetic of the field vecB at a point 20cm from the wire?

A long wire carries a current of 5A. An electron at a distance of 50 cm from this wire is moving with a speed of 10^(7) m/s What is the force acting on the electron, when it moves directly towards the wire ?

A long straight wire carries a current of 10 A. An electron travels perpendicular to the plane of this wire at a distance 0.1 m with a velocity of 5.0 xx10^(6)m//s. What is the force acting on the electron due to the current in wire ?

A long straight wire AB carries a current of 4A . A proton P travels at 4xx10^6ms^-1 parallel to the wire, 0*2m from it and in a direction opposite to the current as shown in figure. Calculate the force which the magnetic field of current exerts on the proton. Also specify the direction of the force.