Question 1 of 8Measurement
A curated set of real ZIMSEC past paper questions with answers and explanations. The full question bank is in the Danho app.
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Which row correctly gives the measuring instruments to measure the length of a wire of about 80 cm and diameter 0.20 cm?
Which one is a vector quantity?
Which diagram shows the motion of a free falling parachutist who eventually attains a terminal velocity?
The diagram shows a shot put ball on a smooth ramp. The ball is released from the position shown to roll down the ramp.
The approximate range of audible frequencies for human beings is
Which type of radiation lies between visible light and microwaves in the electromagnetic spectrum?
Which diagram correctly represents water ripples travelling from deep water to shallow water?
The diagram shows the image of a clock formed by a plane mirror.
A ray of light is passed through a triangular glass prism as shown.
What instrument is used to measure velocity at an instant?
The diagram shows a measurement on a vernier callipers.
A uniform metal rod is heated evenly along its length.
The acceleration of an object falling with terminal velocity is
The speed of a water wave is best described by the distance
Which physical quantity is a scalar quantity?
Which instrument is most suitable for measuring a length of 2.100 cm?
A red powder of volume 25 and density 0.200 and a green powder of volume 40 and density 0.125 were mixed to form a yellow powder.
The graph represents the motion of a body.
Which one has the same unit as moment of a force?
What is the reading shown on the vernier callipers?
What is the density of a piece of metal which has a mass of 450 g and a volume of 48 ?
The graph shows the motion of a car from point A to C.
Which of the quantities is a base quantity?
What is the reading shown on the vernier scale?
Which is the SI unit of temperature?
What is the SI unit of length?
Which one is a unit of pressure?
The SI unit of pressure is
Which instrument is used to accurately measure the diameter of a tungsten wire?
Which instrument accurately measures the internal diameter of a boiling tube?
The smallest reading measured by a micrometer screw gauge is
Which one is not a vector quantity?
Which one is the SI unit of temperature?
State the SI base unit of mass, including its symbol.
Name the laboratory instrument commonly used to measure the mass of an object.
Cyclists P and Q travel along the same straight path. P moves at a constant speed of 20 m/s. Calculate the distance travelled by P in the first 10 s.
Cyclist Q starts from rest and its speed increases uniformly to 20 m/s over the first 10 s. Calculate the acceleration of Q during this time.
Which of the following best describes nuclear fusion?
In Einstein's mass-energy equivalence formula, E = mc², what physical quantity does the symbol c represent?
The sun releases 1.8×10⁶ J of energy from nuclear fusion. Using E = mc², where c = 3×10⁸ m/s, calculate the corresponding decrease in mass.
A light bulb is labelled 240 V, 60 W. Calculate the current that flows through the bulb when it is operating normally.
A light bulb is labelled 240 V, 60 W. Calculate the resistance of the bulb using R = V²/P.
The current-voltage graph of an electronic device shows negligible current until about 2 V, then a steep, non-linear rise in current as voltage increases further. Which statement best describes the resistance of this device?
Fig. 1.1 shows one of the basic laboratory instruments, used to measure small lengths such as wire diameter or sheet thickness. What is the name of this instrument?
On a micrometer screw gauge, the sleeve (barrel) scale reads 8.5 mm and the thimble scale adds a further 0.35 mm. What is the total reading shown?
A micrometer screw gauge is used to measure the diameter of a small workpiece. Which of the following is a correct precaution to take when using this instrument?
State the definition of density in terms of mass and volume.
A stone of mass 20 g is lowered into a measuring cylinder containing 20 cm³ of water; the water level rises to 35 cm³. Calculate the density of the stone.
Fig. 6.1 shows eleven evenly-spaced parallel wavefronts, A to K, moving in air. Calculate the wavelength of the wave.
A cyclist and bicycle have a total mass of 90 kg. The cyclist accelerates from rest with a driving force of 135 N, against a frictional force of 30 N. What is the acceleration of the cyclist?
A cyclist's motion is opposed by friction between two surfaces in contact. State one factor that affects the size of a frictional force between two surfaces.
In the SI system of units, what is the name of the unit of time?
In the SI system of units, which physical quantity has the SI unit kelvin and the symbol K?
Twenty turns of wire are wound closely together around a pencil so that the length spanning the turns is 25 mm. Calculate the thickness of the wire.
Fig. 1.1 shows 20 turns of wire wound closely around a pencil, with the length spanning the turns labelled AB. Name the instrument used to measure the length AB.
An instrument has a spindle, an anvil, a sleeve scale marked in millimetres, and a thimble scale, and includes a ratchet to avoid over-tightening on the object being measured. What is this instrument called?
A micrometer screw gauge used to measure the diameter of a wire has a sleeve (main) scale reading of 5.5 mm, and its thimble scale reads 0.12 mm at the datum line. What is the total diameter reading?
In a table of derived quantities and their SI units, what is the SI unit of area?
An object thrown vertically upwards eventually falls back to the ground. What continues to act on it throughout its flight, causing it to decelerate, stop, then fall back down?
Of acceleration, distance, current and speed, which one is a vector quantity?
Define momentum.
State the physics definition of acceleration.
A physical quantity is best described as a quantity that...