When a ball is dropped from a height onto a loop the loop the energy transfer is Kinetic to GPE
Responda
True
False
Questão 2
Questão
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?
Responda
16.7 Days
63.7 Days
28.3 Days
10.2 Days
Questão 3
Questão
A current of 2 A flows for 30 seconds through a lamp. How much charge has moved?
Responda
60 Coulombs
60 Joules
25 Coulombs
15 Watts
Questão 4
Questão
A current of 12 A flows for 20 minutes into an electric cooker. How much charge has the cooker used?
Responda
14,400 Coulombs
27 Coulombs
50 Coulombs
16,000 Coulombs
Questão 5
Questão
Watts are a measurement of energy
Responda
True
False
Questão 6
Questão
Joules are a measurement of energy
Responda
True
False
Questão 7
Questão
What is current measured in?
Responda
Coulombs
Joules
Watts
Volts
Amps
Questão 8
Questão
How is current measured?
Responda
Voltmeter
Ammeter
Questão 9
Questão
What is the equation to work out power
Responda
P= V x I
P= I/V
P= V/I
Questão 10
Questão
Which Circuit do you connect an ammeter to measure the current?
Responda
Series
Parallel
Questão 11
Questão
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?
Responda
1,533J ,Thermal, 32.98%
1235J, Electrical, 30.66%
1533J, Kinetic, 30.66%
1435J, Kinetic, 54.983%
Questão 12
Questão
What is 1KW equivalent to?
Responda
10W
100W
1000W
10000W
1000000W
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