Figure 7.1 shows a battery of e.m.f. 6.5 V connected in series with a motor, a fixed resistor and a switch. Complete the equation that defines e.m.f. E.

a series circuit containing a 6.5 V battery, an open switch, a fixed resistor and a motor marked M

7(b)(i)Emf Internal ResistanceEasy2 marks

The switch is closed. The battery moves 4300 C around the circuit in 1.8 h. Calculate the work done by the battery.

7(b)(ii)Current Potential DifferenceEasy1 mark

Complete the equation that defines electric current I.

7(b)(iii)Current Potential DifferenceEasy1 mark

Show that the current in the motor is 0.66 A.

Answer

0 words

7(b)(iv)Series Parallel Circuit AnalysisMedium3 marks

The resistance of the fixed resistor is 2.5

Ω

. Calculate the p.d. across the motor.