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1. I'm having problems working out 'sums' with ohms and kilowatts. Please help....

2. I'm having problems working out 'sums' with ohms and kilowatts. Please help....

3. How does the number of coils, current and inserting an Iron core effect the strength of an electormagnet. Please help

4. How does the number of coils, current and inserting an Iron core effect the strength of an electormagnet. Please help

5. How does the number of coils, current and inserting an Iron core effect the strength of an electormagnet. Please help

6. Pls help me answer this question A 2kw kettle is used 5 times a day for 3 mins each time. Calculate the weekly cost of the kettle. If 1 unit of electrical energy costs 8p.

7. Pls help me answer this question A 2kw kettle is used 5 times a day for 3 mins each time. Calculate the weekly cost of the kettle. If 1 unit of electrical energy costs 8p.

8. why do conductors or metals have resistance? What decides the resistance?

9. why do conductors or metals have resistance? What decides the resistance?

10. what is the adcantage of having a pump storage scheme?...