M7.(a) (i) 50 (Hz) 1 (ii) 2760 (W) 1 (b) 12 allow 1 mark for correct substitution, ie 2400/200 or 1 allow mark for 2760/230 provided no subsequent step shown 2 amps 1 (c) the charge is directly proportional to the time switched on for accept for 1 mark the longer time (to boil), the greater amount of charge or positive correlation or they are proportional 2 [7] M8.(a) (i) symbol for a accept 1 symbol for a variable resistor 1 (ii) voltmeter is in series or voltmeter is not in parallel 1 ammeter is in parallel or ammeter is not in series accept an answer in terms of how the circuit should be corrected voltmeter and ammeter are wrong way around is insufficient
M7.(a) (i) 50 (Hz) 1 (ii) 2760 (W) 1 (b) 12 allow 1 mark for correct substitution, ie 2400/200 or allow 1 mark for 2760/230 provided no subsequent step shown 2 amps 1 (c) the charge is directly proportional to the time switched on for accept for 1 mark the longer time (to boil), the greater amount of charge or positive correlation or they are proportional 2 [7] M8.(a) (i) symbol for a accept 1 symbol for a variable resistor 1 (ii) voltmeter is in series or voltmeter is not in parallel 1 ammeter is in parallel or ammeter is not in series accept an answer in terms of how the circuit should be corrected voltmeter and ammeter are wrong way around is insufficient
P2-09-Electric-Circuits.docx