Physics: Energy
Authored by Siobhan Quinn
Physics
4th - 5th Grade
NGSS covered
Used 1K+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The unit of energy is?
Watt
Kilojoule
Kilogramme
Volt
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Complete the statement about the principal of Conservation of Energy.
Energy can be changed for one form to another but the total amount of energy
always increases
always decreases
does not change
varies according to the reaction
Tags
NGSS.HS-PS3-3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Conservation of Energy Questions.
Example: A battery releases 100J of energy to a lamp. The lamp releases 80J of energy as light but it also releases heat energy. How much heat energy is released? Answer=20J ( If he total energy input is 100 and 80 is the output as light, that means that 20 J is left as heat 100J-80J=20J)..Now try these questions..
Question. A battery releases 200J of energy to a lamp. the energy is converted to heat and light. 50kJ is given out as heat. How much is released as Light?
100J
150J
200J
250J
Tags
NGSS.HS-PS3-1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A Radio releases 250J of energy 10J is released as heat , How much is released as sound?
200J
220J
240J
260J
Tags
NGSS.HS-PS3-1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A torch battery releases 50J of energy as heat and 240J as light, What is the total energy released from the battery?
250J
280J
290J
300J
Tags
NGSS.HS-PS3-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The % energy efficiency of an appliance is
total energy input/ useful energy output x 100
useful energy output /total energy input x100
total energy input x useful energy input x100
useful energy output /total energy input x50
Tags
NGSS.HS-PS3-3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a filament bulb the electical power input is 40W andthe light (Useful) energy output is 4W. What is the % efficiency?
1%
10%
0.1%
4%
Tags
NGSS.HS-PS3-1
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