Igcse Model Questions Vol1 2020 Physics Question 19

Practice objective / multiple choice question 19 from the 2020 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 19 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A circuit consists of a 12 V battery with internal resistance \(r\) connected to a lamp of resistance 4 \(\Omega\) in series with a parallel combination of a 6 \(\Omega\) resistor and a 3 \(\Omega\) resistor. The lamp is rated at 6 W when operating at its normal voltage. (a) Determine the internal resistance \(r\) of the battery. (b) Find the current through the lamp. (c) State the terminal voltage across the lamp.

Answer Options

A. a) r ≈ 2.5 Ω, b) I ≈ 1.50 A, c) V_lamp ≈ 5.5 V
B. a) r ≈ 3.0 Ω, b) I ≈ 1.30 A, c) V_lamp ≈ 5.0 V
C. a) r ≈ 4.5 Ω, b) I ≈ 1.10 A, c) V_lamp ≈ 4.4 V
Correct Answer D. a) r ≈ 3.8 Ω, b) I ≈ 1.23 A, c) V_lamp ≈ 4.9 V
Correct Answer
D
Correct Option:
a) r ≈ 3.8 Ω, b) I ≈ 1.23 A, c) V_lamp ≈ 4.9 V

About This Question

This is Igcse Model Questions Vol1 2020 Physics Question 19. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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