Electrical energy

1

Which of these is not a type of lamp?

2

What percentage of energy is transferred to light in a tungsten filament lamp?

3

What factor forces the transfer of electrical energy to heat and light in a lamp?

4

Why is a discharge tube more efficient than a filament lamp?

5

How do you calculate the energy transferred?

6

What does Q stand for?

7

How much energy is transferred in 10 seconds with a current of 13 amperes and a potential difference of 230 volts?

8

How much energy is transferred when the potential difference is 230 volts and the charge is 5 coulombs?

9

Which of these is not the correct equation to calculate the total cost of electricity?

10

If electricity costs 6p per unit and a 5 kW appliance runs for 65 hours, what is the total cost?