Gr12PhySci Novp1 2021
QUESTION 1: MULTIPLE-CHOICE QUESTIONS.
Various options are provided as possible answers to the following questions. Each
question has only ONE correct answer. Choose the answer and select only the letter. In the Exam You will follow the next example.
(A–D) next to the question numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11 E.
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Question 1 of 10
1. Question
1.1
Consider the statement below.
The perpendicular force exerted by a surface on an object in contact with the
surface.
Which ONE of the following forces is defined by the statement above?CorrectIncorrect -
Question 2 of 10
2. Question
1.2 Two balls of masses m and 2m are dropped simultaneously from the same
height above the ground. Ignore air resistance.
When the balls strike the ground, which ONE of the following physical
quantities will be the same for both balls?CorrectIncorrect -
Question 3 of 10
3. Question
1.3 The graph below shows how the momentum (p) of an object changes with
time (t).
During which ONE of the following time intervals, measured in seconds, is the
magnitude of the net force acting on the object the greatest?CorrectIncorrect -
Question 4 of 10
4. Question
1.4 A ball is dropped from a height above a floor. The ball makes an elastic
collision with the floor at time to and bounces vertically upwards.
Ignore air resistance.
Which ONE of the following graphs shows how the total mechanical energy
(EM) of the ball changes with time?
CorrectIncorrect -
Question 5 of 10
5. Question
1.5
Consider the two spectrum diagrams below.
Diagram 1 represents the spectrum of an element in a laboratory on Earth.
Diagram 2 represents the spectrum of the same element from a distant star
as observed from Earth.
Which ONE of the following can be deduced from the spectra above?CorrectIncorrect -
Question 6 of 10
6. Question
1.6
The diagram below shows the field lines for the combined electric field due to
two small charged spheres P and Q.
Which ONE of the combinations below correctly shows the polarity of
CorrectIncorrect -
Question 7 of 10
7. Question
1.7
Two identical spheres, P and Q, carry charges of +q and –2q respectively.
Sphere P exerts an electrostatic force of magnitude F on sphere Q.
Which ONE of the following represents the magnitude of the electrostatic
force exerted on sphere P by sphere Q?CorrectIncorrect -
Question 8 of 10
8. Question
1.8
In the circuit diagram shown below all the resistors are IDENTICAL. Ignore
the internal resistance of the cell.
Which voltmeter will have the HIGHEST reading when switch S is closed?
CorrectIncorrect -
Question 9 of 10
9. Question
1.9
In which ONE of the following electrical machines is electrical energy
converted to mechanical energy?CorrectIncorrect -
Question 10 of 10
10. Question
1.10
Which ONE of the following combinations correctly links an emission
spectrum and an absorption spectrum to the energy transitions of an electron
in an atom?
CorrectIncorrect
