Presentation is loading. Please wait.

Presentation is loading. Please wait.

1111 2222 3333 4444 5555 6666 7777 8888 9999 10 11 12 13 14 15 16 17.

Similar presentations


Presentation on theme: "1111 2222 3333 4444 5555 6666 7777 8888 9999 10 11 12 13 14 15 16 17."— Presentation transcript:

1

2

3 1.What is the current flowing in a circuit if 30C are passed in 1 minute? Q = It 30 = I x 60 I = 30/60 0.5A answer

4 2.What voltage would be measured over a 100 Ω resistor when 10mA flows through it? V = IR V = 0.01 x 100 1V answer

5 3.How many joules of energy are transferred by a 60W bulb every second? P = E/t 60 = E/1 E =60/1 60J answer

6 4. Calculate the size of the current flowing in a 3kW mains operated appliance. answer 13A

7 5.A television draws 0.1 A and has a resistance of 5000Ω. Calculate the power consumption P = IV P = 0.1 x W answer

8 6.How many 1.5V bulbs operating at their correct voltage could be connected in series with a 6V cell? Vs = V1+ V2… 6 = = 4(1.5) Four bulbs answer

9 7. What is the total resistance of a set of Christmas lights comprising of 30 individual 10Ω lamps in series? Rt = R1+R2+… Rt= 30(10) 3600 Ω or 3.6kΩ answer

10 8. An electrical supply for a caravan delivers a total current of 2A to the fridge and lighting circuits. If the lights use 0.25A, what is the operating current of the fridge? It = I lights +I fridge 2= I fridge I fridge = A answer

11 9.What is the total resistance of three 90Ω resistors connected in parallel? 1/Rt = 1/R1+1/R2+1/R3 1/Rt = 1/90+1/90+1/90 1/Rt = 3/90 Rt = 90/3 30 Ω answer

12 10.Work out the enegy used in kWhr for a 2000 W electric heater which is used for 45 mins? E = Pt E= 2(kW)x 0.75(hr) 1.5kWhr answer

13 11.How many joules are used if a tumble dryer uses 0.75 kWh? 750Whr 750J/s(hr) 750x kJ or J answer

14 12. Select the appropriate formula from your data book.. That shows the relationship between charge, current and time. Q=It answer

15 13. Select the appropriate formula from your data book.. That shows the relationship between voltage, current and resistance. V = IR answer

16 14. State Ohm’s Law. V = IR answer

17 15. Rt = R1+R2+R3 answer Select the appropriate formula from your data book.. To calculate resistances in series.

18 16. 1/Rt= 1/R1 +1/R2 + 1/R3 answer Select the appropriate formula from your data book.. For combining resistors in parallel.

19 17. State the relationship between Energy and Power P = E/t answer


Download ppt "1111 2222 3333 4444 5555 6666 7777 8888 9999 10 11 12 13 14 15 16 17."

Similar presentations


Ads by Google