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WorksheetsATS Y9 Physics Exam (Summer)
Total questions: 10
Worksheet time: 5mins
How do you calcluate the efficiency of a device?
useful energy output / total energy input
wasted energy output / total energy input
total energy x useful energy
wasted energy x total energy
A television, transfers electrical energy into light, sound and heat. Which one of these is wasted energy?
light
sound
heat
electrical
What is the correct equation for calcluating kinetic energy?
mass x velocity
0.5 x mass x velocity2
mass / velocity
mass / velocity2
How is energy transferred in solids?
conduction
convection
radiation
What is this symbol?
cell
bulb
diode
resistor
If a cell had a voltage of 1.5V, how many would you need to made 6V?
2
3
4
5
Which energy resource will eventually run out?
solar
wind
waves
gas
What equation links volatge, current and resistance?
V = RI
V = IR
V = I/R
V = R/I
Potential difference is another way of describing...
current
resistance
volatge
What are the units for current?
amps (A)
volts (V)
ohms (Ω)
