NEET · Physics · STD 12 - 4. Moving charges and magnetism
A wire carrying a current \(I\) along the positive \(x\)-axis has length \(L\) It is kept in a magnetic field \(\overrightarrow{ B }=(2 \hat{ i }+3 \hat{ j }-4 \hat{ k }) T\). The magnitude of the magnetic force acting on the wire is \(..........IL\)
- A \(\sqrt{3}\)
- B \(3\)
- C \(\sqrt{5}\)
- D \(5\)
Answer & Solution
Correct Answer
(D) \(5\)
Step-by-step Solution
Detailed explanation
\(\overrightarrow{ F } = I (\vec{\ell} \times \overrightarrow{ B })\) \(= I [( L \hat{ i }) \times(2 \hat{ i }+3 \hat{ j }-4 \hat{ k })]\)
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