WorksheetsGrade 9 _ Science Month Physics
Total questions: 10
Worksheet time: 19mins
Name
Class
Date
1.
A toaster, rated 1500 W 240 V, is switched on for 15 minutes. Calculate the energy used.
a)
3600 J
b)
22 500 J
c)
216 000 J
d)
1 350 000 J
2.
An electric heater is rated 230V, 10 A. Calculate the power of the electric heater in kW.
a)
2300
b)
2.3
c)
0.23
d)
230
3.
What is the current flow in the circuit?
a)
0.5 A
b)
6 A
c)
3 A
d)
1.5 A
4.
What is the voltage in 20 ohm resistor
a)
10 V
b)
40 V
c)
20 V
d)
60 V
5.
What is the total resistance in this circuit?
a)
5.5 ohms
b)
2.0 ohms
c)
0.82 ohms
d)
7.3 ohms
6.
Which of the following is not a property of a magnet?
a)
It loses its magnetism when broken
b)
It attracts iron objects
c)
It has two poles, north and south
d)
It can repel other magnets
7.
When you rub a plastic ruler with a wool cloth, the ruler becomes negatively charged. What actually happens during this process?
a)
The ruler gains protons from the cloth
b)
The ruler loses protons to the cloth
c)
The ruler gains electrons from the cloth
d)
The ruler loses electrons to the cloth
8.
Which of the following materials is not magnetic?
a)
Iron
b)
Nickel
c)
Copper
d)
Cobalt
9.
In a simple circuit, if the voltage is increased while resistance remains the same, the current will:
a)
Increase
b)
Decrease
c)
Stay the same
d)
Become zero
10.
The north pole of a magnet will always attract:
a)
The north pole of another magnet
b)
The south pole of another magnet
c)
A copper coin
d)
Any metal object
100 %
