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Electric Charges and Fields — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectric Charges and Fields1 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 (a), (b), (c) and (d) as given below.
Assertion (A): As force is a vector quantity, hence electric field intensity is also a vector quantity.
​​​​​​​Reason (R): 'Tile unit of electric field intensity is newton per coulomb.
  • A
    Both A and R are true, and R is the correct explanation of A.
  • ✓
    Both A and R are true, but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false and R is also false.
✓

Answer

Correct option: B.
Both A and R are true, but R is not the correct explanation of A.
  1. Both A and R are true, but R is not the correct explanation of A.
Explanation:
The electric field intensity is equal to force experienced by unit positive test charge $\mathrm{q}_0$ placed at that point i.e.
$\vec{\text{E}}=\frac{\vec{\text{F}}}{\text{q}_0}$ thus $\vec{\text{E}}$ is also a vector quality,
As, $\text{E}=\frac{\text{F}}{\text{q}}=\frac{\text{newton}}{\text{coulomb}}.$

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