1
Physical Sciences
Grade 11
November
Exam
Paper 1
These notes in compiled from old papers: @IMPAQ JUN & NOV 2019/2020/2021. (EC/NOVEMBER
2022). WCED Revision Booklet: Content Area: Electricity and Magnetism
These are only suggested answers from the memorandums. Some information is repeated,
I want to show you the different ways the same information is asked.
I encourage you to answer the calculation/illustration questions.
Good luck. Juffrou Ansie
CONTENT
1. Multi – choice p. 2
2. Mechanics p. 7
3. Waves, sound and light p. 19
4. Electricity p. 25 - 43
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, 2
Multiple - choice questions
Newton's first law The law explains why a spacecraft can move through space
at a constant speed without using any fuel.
Faraday's Law. The size of the induced emf at the ends of a conductor is
directly proportional to the rate of change of the magnetic
flux coupling with the conductor.
The emf, ε, produced around a conducting loop is
proportional to the rate of change of the magnetic flux, φ,
through the area, A, of the loop.
Where N is the number of circuit loops and φ = BA , B is the
magnetic field strength
Electromagnetism Electromagnetism is the study of the relationship between
electric and magnetic fields. We have already seen that
there are many similarities between the two.
Right hand rule. If you hold your right thumb in the direction of the current,
your curled fingers should indicate the direction of the
magnetic field. In the example above, the current moves
upwards, so that the magnetic field revolves around it.
Mass and distance Two factors that affect the gravitational attraction between
two objects are mass and distance
Huygens' principle The principle or law that states that every point on a
wavefront can be seen as a source for a new wave is
Huygens' principle.
The vector diagram represents three forces acting
simultaneously on an object moving at a CONSTANT
VELOCITY
In the circuit diagram below, the internal resistance of the
battery and the resistance of the conductors are negligible.
The emf of the battery is E. When switch S is closed, the
reading on the voltmeter is V, in volts
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The diagram shows a magnet moving into a coil, the polarity
of Y is South.
The figure shows a small, positively charged polystyrene ball
hanging from a wooden beam. Due to the
electrostatic force acting on it, the ball is
displaced from its original vertical position.
It comes to rest when the hanging wire
makes an angle with the vertical, as
indicated in the figure.
The free-body diagram best describes the direction of the
forces acting on the ball in this position.
1.0 X 103 N When a basketball player, with weight 5.0 x 102 N, jumps up
from the floor to the basket ('basket') the magnitude of the
force exerted by her feet on the floor is 1.0 x 103 N. When
she jumps then the magnitude of the force exerted by the
floor on her feet
The diagram shows a block experiencing two opposing
forces. There is no frictional force between the block and
the surface. The acceleration of the block will be to the right.
The relationship between the magnitude of the block's
gravitational force, Fg and the Normal force, FN is, Fg > FN.
The net force, in Newtons, acting on the block is Fnet = 200 –
200 cos 30°.
The block accelerates to the left.
Take 'to the left' as positive.
Learners investigate the relationship between current (I) and
potential difference (V) at a constant temperature for three
different resistors, X, Y and Z.
The resistances of X, Y and Z are RX, RY and RZ respectively
Conclusion about the resistance= Rz > RY > Rx
A student pulls a block at a CONSTANT SPEED across a
rough horizontal surface with a horizontal force F. The force
diagram below shows all the forces acting on the block.
F = Y and X = Z
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, 4
Two charged spheres, A and B, are placed on insulated
stands at a distance r from each other, as shown below. The
magnitude of the electrostatic force between the spheres is
F.
The spheres are allowed to touch each other and are
returned to their original positions. The magnitude of the
electrostatic force in terms of F is now
Three identical light bulbs X, Y and Z are connected in a
circuit as shown. The internal resistance of the battery is
negligible. When switch S is closed, the reading on ammeter
A1 is 2.5 A.
Description of the readings on the ammeters (in amperes)
when bulb Z burns out.
A1 = 1.8
A2 = 1.8
A3 = 0
Acceleration A constant, resultant force acts on a body that is free to
move in a straight line. This physical quantity remains
constant.
A man stands on a bathroom scale in an elevator. The man weighs
65 kg. The reading on the scale is 650 N. The elevator accelerates
upward to obtain this reading on the bathroom scale.
A person stands on a bathroom scale, calibrated in newtons, in a stationary elevator. The reading
on the bathroom scale is W. The elevator is now moving at a constant acceleration of g
upwards, where g is the gravitational acceleration. What will the reading on the bathroom scale
be now?
w
An object is dropped from a height 7 km above the earth's surface. If air resistance is ignored, the
acceleration of the object depends on the radius of the earth at that point.
An insect hits the windshield of a moving vehicle. Compared to the
magnitude of the force exerted by the insect on the pane, the force exerted
by the pane on the insect will be the same.
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