Mock Exams SS 3 Physics
EDU DELIGHT TUTORS MOCK EXAMINATION
Subject: Physics
Class: Senior Secondary School 3 (SS3)
Time Allowed: 2½ Hours
Instruction: Answer all questions in Section A and any 5 questions from Section B.
SECTION A – OBJECTIVE QUESTIONS (30 Marks)
Choose the correct option for each question and write only the letter (A–D).
-
The quantity which has both magnitude and direction is:
A. Mass
B. Speed
C. Velocity
D. Distance -
The S.I unit of force is:
A. kgm/s
B. Nm
C. Ns
D. kg -
A body is said to be in equilibrium when:
A. Its mass is constant
B. The net force acting on it is zero
C. It moves in a straight line
D. Its acceleration is uniform -
The density of a body is defined as:
A. Mass per unit area
B. Mass per unit volume
C. Volume per unit mass
D. Weight per unit area -
A car accelerates uniformly from rest to a speed of 20 m/s in 10 seconds. The acceleration is:
A. 2 m/s²
B. 4 m/s²
C. 10 m/s²
D. 0.5 m/s² -
Which of the following is not a vector quantity?
A. Displacement
B. Work
C. Force
D. Acceleration -
A machine has an efficiency of 80%. If the work input is 200 J, the output is:
A. 100 J
B. 160 J
C. 180 J
D. 80 J -
A man weighing 800 N climbs a stair of height 5 m in 10 seconds. The power developed is:
A. 80 W
B. 400 W
C. 40 W
D. 100 W -
The pressure in a liquid increases with:
A. Temperature
B. Height
C. Area
D. Volume -
The temperature at which ice melts is:
A. 212°F
B. 273K
C. 0K
D. 373K -
The latent heat of fusion of a substance is the quantity of heat required to:
A. Raise its temperature by 1°C
B. Change it from solid to liquid
C. Change it from liquid to gas
D. Increase its pressure -
The rate of flow of electric charge is called:
A. Voltage
B. Resistance
C. Current
D. Power -
The unit of electric current is:
A. Volt
B. Ampere
C. Coulomb
D. Ohm -
Ohm’s law is valid only when:
A. The temperature of the conductor is constant
B. The current is alternating
C. The circuit is closed
D. There is no resistance -
The energy stored in a capacitor is given by:
A. CV
B. ½CV²
C. V²/C
D. ½C²V -
The speed of sound in air at room temperature is approximately:
A. 150 m/s
B. 330 m/s
C. 500 m/s
D. 1000 m/s -
A concave mirror forms a real, inverted and magnified image when the object is placed:
A. At the center of curvature
B. Between the focus and pole
C. Beyond the center of curvature
D. At the focus -
The refractive index of a medium is defined as:
A. Speed of light in vacuum / speed in medium
B. Speed in medium / speed in vacuum
C. Angle of incidence / angle of refraction
D. Real depth / apparent depth -
In a series circuit, the total resistance is:
A. Equal to the reciprocal of individual resistances
B. Equal to the sum of the resistances
C. Always less than the smallest resistor
D. Zero -
The part of the eye that controls the amount of light entering is the:
A. Retina
B. Iris
C. Lens
D. Cornea -
Which of the following is a renewable source of energy?
A. Petrol
B. Natural gas
C. Wind
D. Coal -
Which law states that “every action has an equal and opposite reaction”?
A. Newton’s first law
B. Newton’s second law
C. Newton’s third law
D. Law of inertia -
Radio waves travel at the speed of:
A. Light
B. Sound
C. 200 m/s
D. 400 m/s -
The resistance of a wire is directly proportional to its:
A. Length
B. Area
C. Voltage
D. Power -
A transformer works on the principle of:
A. Electromagnetic induction
B. Static electricity
C. Conduction
D. Capacitance -
The unit of power is:
A. Joule
B. Watt
C. Ampere
D. Volt -
A boy lifts a box of mass 10 kg to a height of 2 m. The work done is:
A. 20 J
B. 100 J
C. 200 J
D. 50 J -
Which instrument is used to measure relative humidity?
A. Barometer
B. Hygrometer
C. Thermometer
D. Anemometer -
What type of lens is used to correct short-sightedness?
A. Convex lens
B. Concave lens
C. Biconvex lens
D. Cylindrical lens -
The energy possessed by a body due to its motion is:
A. Potential energy
B. Kinetic energy
C. Heat energy
D. Sound energy
SECTION B – THEORY QUESTIONS (70 Marks)
Answer any 5 questions. Each question carries 14 marks.
-
(a) Define velocity and acceleration.
(b) A car moving with an initial velocity of 5 m/s accelerates uniformly at 3 m/s² for 4 seconds. Find the final velocity and distance covered. -
(a) State the three Newton’s laws of motion.
(b) A force of 10 N acts on a mass of 2 kg. Calculate the acceleration. -
(a) Differentiate between heat and temperature.
(b) Define latent heat of fusion.
(c) State two applications of the expansion of solids. -
(a) What is pressure? State its unit.
(b) A force of 400 N is applied on an area of 2 m². Calculate the pressure.
(c) Mention two uses of the barometer. -
(a) State Ohm’s Law.
(b) A circuit has a resistance of 5 ohms and a voltage of 20 V. Find the current.
(c) State three factors that affect the resistance of a conductor. -
(a) Define refraction of light.
(b) State Snell’s Law of refraction.
(c) A ray of light enters a glass block from air at an angle of incidence of 30°. If the refractive index of glass is 1.5, calculate the angle of refraction. -
(a) What is resonance?
(b) List three applications of sound waves.
(c) State two differences between transverse and longitudinal waves. -
(a) Define electromagnetism.
(b) State two applications of electromagnets.
(c) Draw and label the magnetic field lines around a bar magnet. -
(a) Explain the working principle of a transformer.
(b) Differentiate between step-up and step-down transformer.
(c) State one application of each. -
(a) List four renewable sources of energy.
(b) Mention three advantages of using solar energy over fossil fuel.
(c) Define energy and give its S.I unit.
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