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Electric Current and its Effects — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceElectric Current and its Effects1 Mark
MCQ
Assertion (A) An electric bulb glass becomes hot after sometime when it is connected to an electric supply.
Reason (R) A bulb becomes hot due to the heating effect of electric current.
  • ✓
    Both A and R are true and R is the correct explanation of A
  • B
    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 but R is true.
✓

Answer

Correct option: A.
Both A and R are true and R is the correct explanation of A
(A) Both A and R are true and R is the correct explanation of A
Explanation: When electric current flows, filament wire of bulb becomes red hot due to heating effect of current, which makes electric bulb hot glass after sometime

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