cameroon gce O level June 2023 physics 1

cameroon gce O level June 2023 physics 1

cameroon gce O level June 2023 physics 1

Section 1
(Forty two questions)
Directions: Each of the questions or incomplete statements in this section is followed by four suggested answers. Select the best answer for each question.
Which of the following is a pair of scalar quantities?
A Power, force
B Force, momentum
C Energy, pressure
D Work done, velocity 6. The form of energy stored in a car battery is:
A chemical energy
B heat energy
C light energy
D nuclear energy
7. A builder raises a bag of cement of mass 50 kg
onto a platform which is 3 m high. The work done by the builder in joules is:

A 1500
B 500
C 250
D 150

8. Which of the following energy sources are all
renewable energy sources?
Which of the following is not a contact force?
A Friction A Geothermal energy , oil
B Weight B Sun, oil
C Tension C Sun, wind
D Upthrust D Coal, Biomass

3. The gradient of velocity-time graph represents: •
A the total distance covered
B the average velocity
C the acceleration
D the average distance covered
4. The variation of acceleration due to gravity (g) with time (t) can best be represented by which of the graphs in figure 1?
gi/ .
A B
Figure 1
5. A trolley with a ticker tape attached to it, is caused to run down a runway. A section of the tape produced by a ticker timer of known frequency is displayed in figure 2.
Direction of motion
• ix
Figure 2
The object is:
A moving with constant velocity

9. What are the constituents of the nucleus?
A Protons and electrons
B Protons and neutrons
C Protons, neutrons and electrons
D Neutrons and electrons
10. The half-life of a sample of a radioactive
substance is the time taken for the:
A activity of the sample to reduce by half
B density of the sample to reduce by half C mass of the sample to reduce by half
D size of the sample to reduce by half
11. An object is placed 20 cm from a diverging lens of focal length 10 cm. The image formed is;
A real, inverted and magnified
B virtual, erect and magnified C real, inverted and diminished
D virtual, erect and diminished.
12. In a vacuum, all electromagnetic waves have
the same:
A amplitude
B frequency C speed
D wavelength

B
C
D
23/0580/1 accelerating decelerating moving with constant acceleration
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13. A pond 8 m deep appears to be only 6 m deep
when viewed vertically from above. The refractive index of the water is:
A 48
B 14
C 2
D 1.3
14. Which of the following is true about a p-type
semiconductor?
A It has a net positive charge
13 It has more conduction electrons than
holes
C It has more holes than conduction
electrons
D It has an equal number of holes and conduction electrons
15 The electrical resistance of a metallic
conductor is inversely proportional to its: A cross-sectional area
B length
C resistivity
D temperature
16. Alternating current is preferred to direct current
for transmission of electrical power because: A it can easily be stepped up and stepped down
B it is easily generated
C thinner conducting wires can be used
D it can easily be changed to direct current
17. Which of the following elements can be used to dope silicon to produce a p-type semiconductor?
19. The kWh is the unit of:
A energy
B potential
C power
D resistance
20. Figure 4 shows a connection of three resistors of resistances 352, 6C2 and HI
3K2
5S-2
B
6C2
Figure 4
The resultant resistance across AB is: A 3S2
B 4S2 C 7 n
D 14 fl
21. Which of the following is NOT released by a decaying radioactive nucleus?
A Alpha particles
B Beta particles
C Gamma rays
D X-rays
22. A car of mass 600 kg moving with a constant velocity of 20 m along a straight road is brought to rest in 40 s by applying the brakes. The average retarding force acting on the car during this time is:

A Phosphorus A 1.3 N
B Germanium B ION
C Iron C 300 N
D Boron D 1200 N

18. Which of the graphs in figure 3 best shows how
,}he potential difference (V) across a metal conductor varies with the current (1) flowing
through it?
V V
A
Figure 3

23. Which of the following statements is an
advantage of using a pressure pot to cook food?
A It cooks at a lower temperature . B It cooks at a higher temperature C It cooks at a lower pressure
D It preserves all the food nutrients
24. When matter moves in a bulk and transfers heat from one point to another, the Process is called:
A transmission
B radiation C conduction
D convection