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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Magnetic field lines forms closed loops in nature.
Reason : Mono $-$ magnetic pole does not exist in nature.
  • ✓
    Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
  • B
    Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
  • C
    $A$ is true, but $R$ is false.
  • D
    $A$ is false, but $R$ is true.
✓

Answer

Correct option: A.
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
The magnetic field lines form closed loops, unlike electrostatic field lines which originate from the charge and end at charge. Mono $-$ magnetic pole does not exist in nature.

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