Question

Please help with questions 32-35, especially 34

Answer 1

32. P = V * I

P = 230 * 4 = 920 w

In short, Your Answer would be: 920 w

33. I = P/V

I = 48/12 = 4 A

In short, Your Answer would be: 4 Ampere

34. Now, for this part you've given Voltage & Power, and you need to calculate Current & Resistance, so you could apply two equations here:

(i) For finding Current  = P/V
(ii) For resistance = V²/P

So, Current for Bulb of Study Lamp = 60/230 = 0.260 A
Resistance of Bulb of Study Lamp = 230²/60 = 881.67 Ohm

In similar manner, substitute the known values (Power & Voltage) in each case, you'll have your answers!

35. We know, P = V²/R
P = 230²/48
P = 1102.08 w

Hope this helps!

Answer 2

34.
Current for Bulb of Study Lamp = 60/230 = 0.260 A
Resistance of Bulb of Study Lamp = 230²/60 = 881.67 Ohm

Current for TV = 80/230 = 
Resistance of TV = 230²/80 = 

Current for toaster = 1200/230 = 
Resistance of toaster = 230²/1200 =

2kW = 2000W
Current for heater = 2000/230 = 
Resistance of heater = 230²/2000 = 

Current for shower = 3000/230 = 
Resistance of shower = 230²/3000 =