Gce Model Questions Vol1 2017 Physics Question 35

Practice objective / multiple choice question 35 from the 2017 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2017 Physics Objective / Multiple Choice Hard Difficulty

Question 35 GCE_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • objective

A battery of emf \( \varepsilon = 12 \;\text{V} \) has an internal resistance \( r \). It is connected to a network consisting of a resistor \( R_3 = 8 \;\Omega \) in series with the parallel combination of \( R_1 = 4 \;\Omega \) and \( R_2 = 6 \;\Omega \). (i) Find the value of \( r \) for which the power dissipated in \( R_3 \) is exactly half the total power supplied by the battery. (ii) For that value of \( r \), calculate the current drawn from the battery.

Answer Options

Correct Answer A. r = 5.6 Ω; I = 0.75 A

B. r = 5.6 Ω; I = 0.90 A

C. r = 4.0 Ω; I = 0.85 A

D. r = 7.2 Ω; I = 0.60 A

Correct Answer

Correct Option:

r = 5.6 Ω; I = 0.75 A

About This Question

This is Gce Model Questions Vol1 2017 Physics Question 35. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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