Verified Solution • 2025–26 Session moderate

QNEET-2013-Ph-1611: NEET 2013 Physics - Class 12 NEET-2013-Ph-1611 Solution: A long straight wire carries a certain current and produces a…

A long straight wire carries a certain current and produces a magnetic field 2×10−4 Wb m−22 \times 10^{-4}\ \text{Wb m}^{-2} at a perpendicular distance of 5 cm from the wire. An electron situated at 5 cm from the wire moves with a velocity 107 m/s10^7\ \text{m/s} towards the wire along perpendicular to it. The force experienced by the electron will be (charge on electron 1.6×10−19 C1.6 \times 10^{-19}\ \text{C}) 3.2 N 3.2×10−16 N3.2 \times 10^{-16}\ \text{N} 1.6×10−16 N1.6 \times 10^{-16}\ \text{N} zero

Multiple Choice Options

  • A 3.2 N
  • B 3.2 ×\times _ 10 −- _ 16 N
  • C 1.6 ×\times _ 10 −- _ 16 N
  • D zero

Step-by-Step Verified Solution

The situation is as shown in the figure. Here, v = 10 7 m/s, B = 2 _ 10 �4 Wb/m 2 The magnitude of the force experienced by the electron is F = evBsin _    ( _ v _ a n d B _ a r e perpendicular to each other) = evBsin90� = 1.6 _ 10 �19 _ 10 7 _ 2 _ 10 �4 _ 1 = 3.2 _ 10 �16 N

Related Learning Resources & Exam Preparation

NEET PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring