Physical Sciences Paper 1 (English)
Common 2018 — Grade 12 / Matric — Physical Sciences
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2.1and
Q2— Section header —
1.10\ in the ANSWER BOOK, e.g.
1.1Two forces and F act on a point . If F act in the same directio maximum resultant has a magnitude of 13 N
1.2A free moving block sl ides down an inclined plane at CONSTANT VELOCITY This means that the frictional force
1.4man in a lift is moving upward at a CONSTANT SPEED . The weight of the man is . According to Newt hird aw, the reaction force of the
1.6In which ONE of the graphs below will the gradient represent the refractive
1.7ery point on a wave front acts as a point source of spherical, secondary waves that move f orward the same speed as the wave . This statement represents Snell s law
1.8Three charg es of magnitude +2q, +2q and are shown in the sketch below. ich arrow CORRECTLY indicates the
1.9Which ONE of the sketches below represents the CORRECT magnetic field ttern around a straight current carrying conductor?
1.10Which ONE of the graphs below CORRECTLY represents the relationship between potential difference and current in a non ohmic resistor? (2\ [20]20
2.1Give the correct term for th e following description A single vector having the same effect as two or more vectors together
2.2Calculate the:
2.2.1Magnitude of the vertical component of the 50 N (2\
2.2.2Magnitu de of the resultant (net\ force
2.2.3Direct ion of the resultant (net\ force (2\
3.1Define t he term kinetic frictional force
3.2State Newton irst of otion in words.
3.3Calculate the magnitude of the horizontal component of the applied force. (2\
3.4Calculate the magnitude of the normal force. Calculate the coefficient of kinetic friction.
3.6Will the coefficient of kinetic friction change if the angle of the applied force is decreased? Write only YES or NO
Q4— Section header —
4.1State Newton econd aw of otion in words. (2\
4.2Calculate the gradient of the graph. (3\
4.3nce etermine the net force applied the object during the experiment.
4.4Write down a conclusion for this experiment. (2\ [9] Graph of the inverse of acceleration versus mass 2,5 1,5 0,59
5.1Draw a f ree body diagram of ALL the forces acting on the crate while it moves from B to C.
5.2Calculate the magnitude of the ac celeration of the crate while it moves from A to B.
5.3Write down the direction of the acceleration of the crate while it slows down from B to C. Write only UP THE SLOPE or DOWN THE SLOPE
5.4The magnitude of the net acceleration from B to C is 1,2 . Calculate the gnitude of the frictional force acting on the crate. [12 UESTION 6 (S tart on a new page.\ The gravitational force on a probe
6.1State Newton s Law of Universal Gravitation in words. (2\ Calculate the mass of the probe.
6.38
7.1Name the phenomenon described by the underlined words above.
7.2If the refractive index of water and air is 1, and 1 respectively , calculate the light ray and the SURFACE OF THE WATER if the angle of refraction in the water
7.3
7.6Is it possible that total internal reflection the light ray can occur in the above ituation ? Write
8.1Define the term diffraction
8.2Write an investigative question for this experiment The degree of diffraction is recorded for different colours of monochromatic light and the results are shown on the graph below.
8.3Write the mathematical relationship between wave length and the degree of diffraction.
8.4Which colour of light, RED or GREEN, the largest degree of diffraction? (1\ The experiment is repeated w ith only green light
8.5Copy he set of ax below into your ANSWER BOOK and draw a graph show ing the relationship between slit width
Q9— Section header —
9.1State Coulomb s law in words.
9.2Draw a VECTOR DIAGRAM of the forces acting on sphere A. Indicate at least ONE angle. (4\
9.3Calculate the magnitude of the electrostatic force that sphere B exerts sphere A.
9.4Calculate the magnitude of the tension force in the string. [13 QUESTION (Start on a new p age.\ Two points P and T
10.1
10.2Calculate:
10.2The ratio the electric field point P to the electric field at point T Write the answer as
10.2
Q11— Section header —
11.1State Faraday of lectromagnetic nduction in words. (2\
11.2Calculate the change in the magnetic flux. (3\
11.3
1.4How will the induced emf be affected ? Write only INCREASE, DECREASE or STAY THE SAME. (1\
11.5Explain th e answer to
Q11— Section header —
11.7In which direction will the induced current flow? Write only FROM A TO B or FROM B TO A (1\ [13 15
Q12— Section header —
12.1Calculate the value of resistor R if the total resistance the circuit is 4, (3\
12.2Calculate the reading on the voltmeter if the curre nt through the 4R resistor is 1, 8 A.
12.3Calculate the energy converted in resistor 4R in 2 minutes (3\ The 4R resistor is replaced with an ammeter.
12.4ow will the reading on the voltmeter be influenced? Write only INCREASE, DECREASE or STAY THE SAME. (1\
12.5Exp lain the answer to
Q12— Section header —
Mathematical Content
2
f(x)trig
Topics Identified
4
MechanicsElectricityWavesOptics
Mark Allocation
Sections20 + 9 + 8 = 37 marks
Key Information
Contact Number0235622221
Paper information
SubjectPhysical Sciences
Year2018
SessionCommon
TypePast Paper
PaperPaper 1
LanguageEnglish
Pages17
Downloads12
Examination context
Decade2010s
Years ago8y
Season—
Start day—
Exam period—
Days since exam—
About Physical Sciences examination preparation
Grade 12 Physical Sciences combines Physics and Chemistry. Paper 1 covers mechanics, electricity, waves, and optics, while Paper 2 focuses on chemical bonding, organic chemistry, and electrochemistry.
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applying scientific principles
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