AQA AS Physics C13 DC Circuits Kerboodle Answers

This page contains the AQA AS Physics P13  DC Circuits Kerboodle Answers for revision and understanding of  DC Circuits. This page also contains the link to the notes and video for the revision of this topic. 

Banner 1 h2>13.1 Circuit rules AQA AS Physics C13 DC Circuits Kerboodle Answers : Page No. 216 1.Ans- a the current through each light bulb. 1.0 A, 4.0A b the current from the battery, 5.0A c the power supplied by the battery. 30W 2.Ans- a Sketch the circuit diagram for this circuit. b i the pd across the variable resistor, 2.0V ii the current through the torch bulb. 0.20A 3.Ans- a Sketch the circuit diagram. b The ammeter reads 0.20 A, Calculate i the pd across the 20 Q resistor, 4.0V ii the pd acrossR, 2.0 v iii the resistance of R. 10 Ω 4.Ans- a the pd across the torch bulb, 3.6V b the resistance of the torch bulb. 30 Ω

13.2 More about resistance AQA AS Physics C13 DC Circuits Kerboodle Answers : Page No. 219

1. a 16 Ω b 3.0 Ω c 4 Ω 2. . a the combined resistance of the 3 resistor and a 6 Q resistor in parallel 2 Ω b the total resistance Of the circuit 6 Ω c the battery current 1.0 Ω d the power supplied to the 4 Q resistor. 4. 0 Ω 3. a the total resistance of the circuit 3.6 Ω b the battery current 0.83 A c the power supplied to each resistor 2 Ω: 0.5 W, 4 Ω: 1.0W, 9 Ω: 1.0 W d the power supplied bg the battery, 2.5 W 4. a 14.4 W b 2.4 Ω

13.3 Electromotive force and internal resistance AQA AS Physics C13 DC Circuits Kerboodle Answers  : Page No. 222

1. a the total resistance Of the circuit 6.0 Ω b the current through the battery 2.0A c the lost pd 3.0V d the pd across the cell terminals. 9.0V 2. a the current 0.5A b the terminal pd 1.25 v c the power delivered to the 2.5 Q resistor 0.63W d the power wasted in the cell. 0.13W 3.a the internal resistance of the cell 2.0 Ω b the cell’s em f. 1.5V 4.12V, 2 Ω

13.4 More circuit calculations AQA AS Physics C13 DC Circuits Kerboodle Answers : Page No. 225

1. a the total resistance of the circuit 12.0 Ω b the cell current 0.25A c the current and pd for each resistor.
4 Ω: 0.25A, 1.0V, 24 Ω: 0.08A, 2.0V; 12 Ω: 0.17 A, 2.0 V 2 .a the total resistance of the circuit 20.0 Ω b the cell Current 1.05A c the current and pd across the 15 Q resistor. 1.05A, 15.8V 3.i the power delivered to each external resistor, 2.0W ii the power wasted due to internal resistance. 2.0W 13.5 The potential divider

AQA AS Physics C13 DC Circuits Kerboodle Answers  : Page No. 227

1.The brightness of the light bulb increases gradually from zero to maximum brightness. 2.i the current, 0.5A ii the pd across each resistor. 8.0 Ω n: 4.0V; 4. Ω: 2.0V b.i 20 C, 3.0V ii 10C C. 4.0V 3. 2.8V ii 6.4k Ω Banner 8

Practice questions: Page No. 228-229

1.(a) Draw the arrangement, using all three resistors, which will give the largest resistance (b) R = 3.0 + 4.0 + 6.0 = 13 Ω (c) Draw the arrangement using all three resist off, which will give the smallest resistance. (d) 2. (a). (b) 3. (a) (b) c (i) (ii) total power P = I2 R = 2.42 × 11 = 63 W 4. (a) b (i) (ii) (iii) Calculate the resistance of R. (iv) Calculate the emf of the battery. (6 marks) AQA. 2007 5. (i) the total Current in the circuit, (ii) the voltage between the points P and O, pd across PQ = pd across total external resistance = I R = 0.194 × 60 = 11.6 V (iii) the power dissipated in resistor A. Power P = I2 R = 0.1942 × 30 = 1.13 W (iv) Energy dissipated = Pt = 1.13 × 20 = 23 J 6. (a) (i) zero (0 V), or negligibly small (ii) (iii) (b) So that the current supplied by the unit is restricted to a value below danger level.

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