Home
/
Physics
/
(c) Fig. 1(c) is an electric circuit that follow. 3 (i) State one function for each of the parts labelled I, II, III and IV. (ii) If the voltmeter reads 2.4 V and the ammeter reads 0.8 A when the circuit is closed, calculate the value of the part labelled IV. [4 marks] [3 marks] (iii) State one way of conserving the value of the part labelled I in the circuit. (iv) State two observations that can be made when the circuit is closed. -[1 mark] [2 marks]

Question

(c) Fig. 1(c) is an electric circuit that follow. 3 (i) State one function for each of the parts labelled I, II, III and IV. (ii) If the voltmeter reads 2.4 V and the ammeter reads 0.8 A when the circuit is closed, calculate the value of the part labelled IV. [4 marks] [3 marks] (iii) State one way of conserving the value of the part labelled I in the circuit. (iv) State two observations that can be made when the circuit is closed. -[1 mark] [2 marks]

(c) Fig. 1(c) is an electric circuit that follow. 3 (i) State one function for each of the parts labelled I, II, III and IV. (ii) If the voltmeter reads 2.4 V and the ammeter reads 0.8 A when the circuit is closed, calculate the value of the part labelled IV. [4 marks] [3 marks] (iii) State one way of conserving the value of the part labelled I in the circuit. (iv) State two observations that can be made when the circuit is closed. -[1 mark] [2 marks]

expert verifiedVerification of experts

Answer

4.5278 Voting
avatar
ColinMaster · Tutor for 5 years

Answer

### (i) Part I: Provides electrical energy (battery). Part II: Limits current (resistor). Part III: Controls the circuit (switch). Part IV: Another resistor or component.<br />### (ii) The value of Part IV is \(3 \, \Omega\).<br />### (iii) Conserve the battery by reducing current draw or turning off the circuit when not in use.<br />### (iv) Observations: Current flows through the circuit, and resistors dissipate heat.

Explain

## Step1: Identify the Functions of Circuit Parts<br />### Analyze the circuit diagram to identify the functions of parts I, II, III, and IV. Part I is typically the power source (battery), Part II is often a resistor, Part III could be a switch, and Part IV might be another resistor or a component whose value we need to calculate.<br />## Step2: Calculate the Value of Part IV<br />### Use Ohm's Law, \(V = IR\), to find the resistance of Part IV. Given \(V = 2.4 \, \mathrm{V}\) and \(I = 0.8 \, \mathrm{A}\), calculate \(R\) as \(R = \frac{V}{I} = \frac{2.4}{0.8} = 3 \, \Omega\).<br />## Step3: Conserve the Value of Part I<br />### To conserve the battery (Part I), reduce the current draw by using energy-efficient components or turning off the circuit when not in use.<br />## Step4: Observations When the Circuit is Closed<br />### When the circuit is closed, current flows through the circuit, and the components (like resistors) will exhibit their respective behaviors (e.g., resistors will dissipate heat).<br /><br />#
Click to rate:

Hot Questions

More x