Gce Model Questions Vol1 2017 Physics Question 29

Practice objective / multiple choice question 29 from the 2017 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2017 Physics Objective / Multiple Choice Hard Difficulty
Question 29 GCE_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • objective

A battery of emf \(\varepsilon = 12\ \text{V}\) and internal resistance \(r = 1\ \Omega\) is connected to a circuit as follows: resistors \(R_1 = 4\ \Omega\) and \(R_2 = 6\ \Omega\) are in parallel, this combination is in series with a resistor \(R_3 = 8\ \Omega\), and a switch \(S\) controls the connection of \(R_3\). (a) When the switch is closed, calculate the current through \(R_1\). (b) Immediately after the switch is opened, find the potential difference across \(R_1\). (c) If the switch remains open for 30 s, calculate the total energy dissipated in \(R_2\) during this interval. Give numerical answers with three significant figures.

Answer Options

A. (a) 0.540 A; (b) 7.92 V; (c) 3.20×10^{2} J
Correct Answer B. (a) 0.632 A; (b) 8.47 V; (c) 3.59×10^{2} J
C. (a) 0.600 A; (b) 8.00 V; (c) 3.80×10^{2} J
D. (a) 0.710 A; (b) 9.15 V; (c) 4.10×10^{2} J
Correct Answer
B
Correct Option:
(a) 0.632 A; (b) 8.47 V; (c) 3.59×10^{2} J

About This Question

This is Gce Model Questions Vol1 2017 Physics Question 29. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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