When a ball is dropped from a height onto a loop the loop the energy transfer is Kinetic to GPE
Mrs Smith Would like to fit draught proofing into her house for a fee of £150. This will save 6000w of power for heating every two hours. Each unit cost 5p, What is the Payback time of the draught proofing?
16.7 Days
63.7 Days
28.3 Days
10.2 Days
A current of 2 A flows for 30 seconds through a lamp. How much charge has moved?
60 Coulombs
60 Joules
25 Coulombs
15 Watts
A current of 12 A flows for 20 minutes into an electric cooker. How much charge has the cooker used?
14,400 Coulombs
27 Coulombs
50 Coulombs
16,000 Coulombs
Watts are a measurement of energy
Joules are a measurement of energy
What is current measured in?
Coulombs
Joules
Watts
Volts
Amps
How is current measured?
Voltmeter
Ammeter
What is the equation to work out power
P= V x I
P= I/V
P= V/I
Which Circuit do you connect an ammeter to measure the current?
Series
Parallel
A Petrol car requires 5,000J of energy to run properly. 3,467J of that are wasted as Heat(Thermal) energy. How much usefule energy is there, What type of energy, and what is the efficiency of the car?
1,533J ,Thermal, 32.98%
1235J, Electrical, 30.66%
1533J, Kinetic, 30.66%
1435J, Kinetic, 54.983%
What is 1KW equivalent to?
10W
100W
1000W
10000W
1000000W
