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Science Assertion (A) & Reason (B) MCQ

Electricity: Circuits and their Components · Gujarat Board (GSEB) STD 7 (GSEB - English Medium). 8 questions.

Questions

Assertion (A) & Reason (B) MCQ

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8 questions · timed · auto-graded

MCQ 11 Mark
Assertion (A): The switch in a circuit is used to control the flow of electricity.
Reason (R): The switch opens or closes the circuit to either allow or stop the flow of 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
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MCQ 21 Mark
Assertion (A): A battery is used to power an electrical circuit.
Reason (R): A battery provides a source of voltage to move electrons through the circuit.
  • ✓
    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
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MCQ 31 Mark
Assertion (A): The flow of electric current in a circuit requires a complete path.
Reason (R): If the circuit is incomplete, current will not flow.
  • A
    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
self
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MCQ 41 Mark
Assertion (A): LED lamps are more efficient than filament bulbs.
Reason (R): LEDs emit light without generating much heat.
  • ✓
    Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
  • B
    Both Assertion (A) and Reason (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 Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
A
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MCQ 51 Mark
Assertion (A): The electric cell has two different terminals to allow current to flow.
Reason (R): Current flows from lower to higher potential in a closed circuit.
  • A
    Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
  • B
    Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
  • ✓
    (A) is true, but (R) is false.
  • D
    (A) is false, but (R) is true.
Answer
Correct option: C.
(A) is true, but (R) is false.
C
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MCQ 61 Mark
Assertion (A): A filament in an incandescent lamp is made of tungsten.
Reason (R): Tungsten filaments glow because they resist current and produce heat.
  • ✓
    Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
  • B
    Both Assertion (A) and Reason (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 Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
A
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MCQ 71 Mark
Assertion (A): LED glows only when current flows in one direction.
Reason (R): It is unidirectional in nature.
  • ✓
    Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
  • B
    Both Assertion (A) and Reason (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 Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
A
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MCQ 81 Mark
Assertion (A): A circuit diagram uses symbols of electrical components.
Reason (R): It is easier to draw and understand electric circuits by using symbols.
  • ✓
    Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
  • B
    Both Assertion (A) and Reason (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 Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
A
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Assertion (A) & Reason (B) MCQ - Science STD 7 Questions - Vidyadip