Malaysia SPM Form 5 Physics - Electricity

1.1 Electric Charge
1.2 Electric Current
1.3 Potential Difference
1.4 Ohm's Law & Resistance
2.1 Circuit - Resistance
2.2 Circuit - Current
2.3Circuit - Potential Difference
3.1 Electromotive Force (E.M.F.)
4.1 Electrical Energy and Power

Electric Charge and Field

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1) 1.25 ×1019 electrons are added into an object. Calculate the nett charge of the object in the unit of Coulomb. (Charge of 1 electron = -1.6 ×10-19C)

Choice 1
2C
Choice 2
-2C
Choice 3
1.5C
Choice 4 -1.5C


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2) 1.25 ×1019 electrons are removed from an object which initially has net charge of +3C. Find the FINAL nett charge of the object.
(Charge of 1 electron = -1.6 ×10-19C)

Choice 1
-2C
Choice 2
+2C
Choice 3
+5C
Choice 4 +1C



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3) The charge of an electron is -1.6×10-19C. How many electrons are there in -3 Coulomb of charge?


Choice 1
1.875 ×1019
Choice 2
6.025 ×1019
Choice 3
1.250 ×1019


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4) The charge of a sphere is +2C. Which of the followings is true regarding the sphere?

Choice 1
There are no electrons in the sphere.
Choice 2
There are 1.25 ×1019 protons more than electrons in the sphere.
Choice 3
There are 1.25 ×1019 protons in the sphere.
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electric Field

5) In the figure above, which picture shows the correct field pattern of the electric field around charged objects?


Choice 1
Q only
Choice 2
P, Q and R only
Choice 3
R and S only
Choice 4 Q and S only


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electric field

6) In the figure above, which picture shows the correct field pattern of the electric field around charged objects?

Choice 1
Q and S only
Choice 2
P and Q only
Choice 3
P, Q and S only
Choice 4 P, Q, R and S


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7) The SI unit for electric charge is
I. Ampere
II. Ampere second
III. Coulomb


Choice 1
I only
Choice 2
III only
Choice 3
I and III only
Choice 4 II and III only


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candle in an electric Field

8) Which of the figure among P, Q, R and S shows the correct observation of a candle flame in an electric field?

Choice 1
P
Choice 2
Q
Choice 3
R
Choice 4 S


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9) The figure shows a ping pong ball coated with a layer of conductor touching a positive plate. What can be observed when the ping pong ball is released?


Choice 1
The ping pong ball stick on the positive plate.
Choice 2
The ping pong ball is pushed to the negative plate and stick on the negative plate.
Choice 3
The ping pong ball oscillates between the positive and the negative plate.
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electromagnetism notes