Diagram 3.3 shows a remote control airplane (RC airplane). Diagram 3.3
Suggest modification to the batteries of the RC airplane so that it can fly higher and longer in the
air based on the aspects given.
(i) Voltage used:
Reason:
[2 marks]
(ii)Internal resistance, r of the battery :
Reason:
[2 marks]
(iii) Type of the battery used :
Reason:
[2 marks]

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.