4) In Fig. 6, the 26-V source delivers 9.5 W of power. What is R? (2 marks) ANS: 2R W 26V w BR im Fig. 6 (5) In Fig. 7,

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4 In Fig 6 The 26 V Source Delivers 9 5 W Of Power What Is R 2 Marks Ans 2r W 26v W Br Im Fig 6 5 In Fig 7 1 (39.22 KiB) Viewed 25 times

4) In Fig. 6, the 26-V source delivers 9.5 W of power. What is R? (2 marks) ANS: 2R W 26V w BR im Fig. 6 (5) In Fig. 7, the ammeter has an internal resistance of 100 and the voltmeter has an internal resistance of 30 k.2. What are the readings of the ammeter and voltmeter? (4 marks) ANS: w 100 15 V 1k 1ko Fig. 7. (6) (a) A spherical raindrop carries a charge of 2.5 puniformly distributed over its volume. If the electric field at its surface is 2 N/C, what is the radius of the raindrop? (2 mark) ANS: (b) Two identical raindrops, each with radius and charge specified in part (a), collide and merge into one larger raindrop. What is the potential at its surface if its charge is uniformly distributed over its volume? (2 mark) ANS: (7) A "1000-W" electric heater is designed to operate from 240-V lines. (a) What is its resistance? (b) What current does it draw? (c) If the line voltage drops to 220 V, what power does the heater take? (3 marks) ANS: 5