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3 marksResistance, R

CSEC Physics · January 2011 · Paper 2 · Question 3(b)(ii)

In the circuit shown in Figure 2, R₁ = 4Ω, R₃ = 8Ω and the supply is 24V. With switch S open, the current I through the ammeter is 2 A.

Calculate the value of R₂.

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Other parts of this question

  1. 3(a)Complete Table 3 which relates electrical circuit symbols to the names of electrical components.[6 marks]
  2. 3(b)(i)State the formula which relates voltage, V, current, I and resistance, R.[1 mark]
  3. 3(b)(iii)What is the reading on voltmeter (V)?[2 marks]
  4. 3(b)(iv)If switch S is closed, what would be the new reading on ammeter, (A)?[3 marks]

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