JEE Main 202431 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2024
- Date
- 31 January
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Magnetic Effects of Current
JEE Main 2024 · 31 January · Morning Shift · Physics · Magnetic Effects of Current
A rigid wire consists of a semicircular portion of radius R and two...
A rigid wire consists of a semicircular portion of radius and two straight sections. The wire is partially immerged in a perpendicular magnetic field B = {B}_{0}\overset{^}{j} as shown in figure. The magnetic force on the wire if it has a current is :
Options
- A- iBR\overset{^}{j}
- B2iBR\overset{^}{j}
- CiBR\overset{^}{j}
- D- 2iBR\overset{^}{j}
Correct answer
D. - 2iBR\overset{^}{j}
Step-by-step solution
Direction of magnetic field is in + \overset{^}{k}
Force acting on wire is given by,
As, , we get
⇒ \overset{\to}{F} = - 2iRB\overset{^}{j}