Fizik

Explanation 4 marks

The 60.0 cm nichrome wire in Circuit 2 is replaced with a thicker nichrome wire of the same length. Explain what changes occur to the brightness of...

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Explanation 5 marks

Using Circuit 1 and Circuit 2, compare the potential difference across the nichrome wire, the current flowing and the effective resistance in the c...

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Explanation 6 marks

Suggest modifications that can be made to the transformer so that the collector plates can be charged more efficiently. State and explain your modi...

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Evaluation 10 marks

You are required to suggest modifications that can be made to the water heater so that the shower head is safe to hold and can produce a fast, hot ...

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Explanation 4 marks

State Pascal's principle and explain how the hydraulic lift produces a force large enough to raise a motorcycle.

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Explanation 4 marks

Explain why the trapped air bubbles make the lift slow and reduce the force it produces at the platform.

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Evaluation 10 marks

Table 1 shows the characteristics of four hydraulic lift models. Model J: input piston to output piston area ratio 1 : 2, hydraulic oil, high-power...

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Explanation 4 marks

During practice Aina falls from her longboard at the same speed either onto a foam crash mat or onto a bare concrete kerb. Explain why falling onto...

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Explanation 5 marks

At the paddock Aina pushes trolley P (mass 20 kg) with a horizontal force of 60 N and trolley Q (mass 40 kg) with a horizontal force of 40 N. Ignor...

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Evaluation 10 marks

Suggest modifications to Aina's longboard and to her outfit that would allow her to accelerate faster in the race and be better protected when she ...

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Explanation 4 marks

Based on the structure of the spray gun, describe how the liquid paint in the reservoir can be converted into a fine mist.

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Explanation 4 marks

Based on the kinetic theory of matter, explain how the melting ice can cool the sugar-cane juice.

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Evaluation 10 marks

Based on the specifications in the table, you are required to determine the most suitable spray-gun model to produce a fine, even mist of paint con...

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Evaluation 10 marks

Based on the specifications in the table, you are required to determine the most suitable freezer to freeze 300 kg of marinated chicken effectively...

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Explanation 3 marks

Mei Ling prints a warning that steam at 100 °C causes a more serious scald than the same mass of boiling water at 100 °C. Explain why.

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Explanation 4 marks

Explain why the kettle's flexible cable is made from copper wire while the heating element coil is made from nichrome wire.

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Explanation 4 marks

The output of the full-wave rectifier still rises and falls in humps. Explain how the capacitor connected in parallel with the control board smooth...

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Evaluation 10 marks

Table 2 shows the characteristics of the four kettle prototypes. Prototype W: heating coil with few turns, nichrome element, copper cable, 13 A fus...

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Explanation 4 marks

Explain why photoelectrons are emitted from the surface of metal R when the violet light is shone on it, and state what is represented by the magni...

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Explanation 4 marks

Explain how the trace displayed on the C.R.O. screen is formed, and how the capacitor can be used to smooth the output current.

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Explanation 5 marks

State the characteristics of a suitable lens to help Encik Rahman see the tiny watch parts more clearly, give a reason for each characteristic, and...

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Explanation 5 marks

Using the student's results, describe the graph of R against l that she should obtain, state the relationship between R and l, and state - with a r...

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Evaluation 10 marks

Using Farid's observation, plan a complete laboratory experiment to investigate the relationship between the length of a simple pendulum and its pe...

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Explanation 1 mark

State the S.I. unit of frequency.

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Explanation 1 mark

State the nature of an alpha particle.

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Explanation 1 mark

State the S.I. unit of the activity of a radioactive source.

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Explanation 1 mark

An ideal transformer has 1000 turns on its primary coil. It steps 240 V down to 12 V. Calculate the number of turns on the secondary coil.

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Explanation 1 mark

State Lenz's law.

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Explanation 1 mark

Name the physical quantity that is equal to force multiplied by the time for which it acts (unit: newton second, N s).

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Explanation 1 mark

A water wave in a ripple tank has a period of 0.02 s. Calculate its frequency.

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Explanation 1 mark

State the law of reflection of light.

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Explanation 1 mark

State the meaning of the refractive index of a transparent medium.

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Explanation 1 mark

Name the phenomenon in which a light ray travelling inside an optical fibre is completely reflected at the boundary when its angle of incidence exc...

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Explanation 1 mark

State Ohm's law.

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Explanation 1 mark

A resistor of resistance 5 ohm carries a current of 2 A. Calculate the potential difference across the resistor.

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Explanation 1 mark

State the S.I. unit of electrical power.

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Explanation 1 mark

State the S.I. unit of specific heat capacity.

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Explanation 1 mark

A stone of mass 2 kg is lifted to a shelf 3 m above the ground. Taking g = 10 m/s², calculate the gravitational potential energy gained.

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Explanation 1 mark

State the meaning of the half-life of a radioactive sample.

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Explanation 1 mark

State the S.I. unit of pressure.

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Explanation 1 mark

Name the principle stated as: pressure applied to an enclosed fluid is transmitted equally to every part of the fluid.

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Explanation 1 mark

State the S.I. unit of electric charge.

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Explanation 1 mark

A lorry of mass 1200 kg moves along a straight road at 15 m/s. Calculate the momentum of the lorry.

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Explanation 1 mark

State the principle of conservation of energy.

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Explanation 1 mark

Name the form of energy stored in a stretched catapult rubber before it is released.

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Explanation 2 marks

A car starts from rest and reaches a velocity of 20 m/s in 8 s along a straight road. Calculate its acceleration.

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Explanation 2 marks

An object has a mass of 5 kg. Taking g = 9.8 m/s², calculate its weight.

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Explanation 2 marks

A force of 200 N acts uniformly over a surface of area 0.5 m². Calculate the pressure exerted on the surface.

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Explanation 2 marks

Calculate the heat energy needed to raise the temperature of 2 kg of water by 5 degrees Celsius. The specific heat capacity of water is 4200 J/(kg ...

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Explanation 2 marks

State two factors that affect the resistance of a metal wire at constant temperature.

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Explanation 2 marks

An electrical appliance operates at 12 V and draws a current of 3 A. Calculate its power.

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Explanation 2 marks

A sound wave has a frequency of 200 Hz and a wavelength of 1.5 m. Calculate its speed.

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Explanation 2 marks

A constant horizontal force of 50 N pushes a box a distance of 4 m across the floor in the direction of the force. Calculate the work done.

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Explanation 2 marks

State two ways to increase the strength of an electromagnet.

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Explanation 2 marks

A ball of mass 2 kg moves with a velocity of 6 m/s. Calculate its kinetic energy.

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Explanation 3 marks

A stone is dropped from rest from the top of a cliff and falls freely for 3 s. Taking g = 10 m/s² and ignoring air resistance, calculate the veloci...

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Explanation 3 marks

An electric heater is connected to the 240 V mains supply and draws a current of 5 A. Calculate the resistance of the heater, its power, and the el...

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Explanation 3 marks

A ray of light travels from air into a glass block with a refractive index of 1.5, striking the surface at an angle of incidence of 30 degrees. Cal...

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Explanation 1 mark

State the SI unit of momentum.

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Explanation 1 mark

Name the physical quantity defined as the rate of change of velocity.

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Explanation 1 mark

State the SI unit of pressure.

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Explanation 1 mark

State the principle of conservation of energy.

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Explanation 1 mark

Name the type of image formed by a plane mirror.

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Explanation 1 mark

State the SI unit of electric charge.

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Explanation 1 mark

A car travels 300 m along a straight, level road in 20 s at constant velocity. Calculate its velocity.

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Explanation 1 mark

State the SI unit of frequency.

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Explanation 1 mark

Name the change of state in which a solid turns directly into a gas without first becoming a liquid.

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Explanation 1 mark

State Ohm's law.

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Explanation 1 mark

A water wave has a wavelength of 0.4 m and travels at a speed of 2 m/s. Calculate its frequency.

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Explanation 1 mark

State the SI unit of power.

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Explanation 1 mark

Name the type of electromagnetic radiation used to carry the signal from a TV remote control to the television.

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Explanation 1 mark

State what is meant by the density of a material.

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Explanation 1 mark

A resultant force of 20 N acts on an object of mass 5 kg. Calculate its acceleration.

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Explanation 1 mark

State the SI unit of specific heat capacity.

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Explanation 1 mark

Name the electronic component that allows electric current to flow through it in one direction only.

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Explanation 1 mark

State whether a transformer with 800 turns on the primary coil and 200 turns on the secondary coil is a step-up or a step-down transformer.

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Explanation 1 mark

Name the phenomenon by which an electromotive force is produced in a coil when the magnetic flux linking it changes.

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Explanation 2 marks

A 2 kg ball moving at 6 m/s hits a wall and is brought to rest. Calculate the change in momentum of the ball.

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Explanation 2 marks

A force of 250 N acts uniformly over a surface of area 0.05 m². Calculate the pressure exerted on the surface.

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Explanation 2 marks

State two factors, other than temperature, that affect the resistance of a metal wire.

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Explanation 2 marks

The refractive index of a glass block is 1.5. Taking the speed of light in a vacuum as 3.0 × 10⁸ m/s, calculate the speed of light in the glass.

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Explanation 2 marks

A heater supplies 2400 J of heat to 0.30 kg of oil and its temperature rises by 4.0 °C, with no heat lost. Calculate the specific heat capacity of ...

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Explanation 2 marks

State two ways of increasing the force acting on a current-carrying conductor placed in a magnetic field.

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Explanation 2 marks

Two resistors of 3 Ω and 6 Ω are connected in parallel. Calculate the effective (combined) resistance of the combination.

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Explanation 2 marks

A lamp of resistance 8 Ω carries a current of 3 A. Calculate the electrical power dissipated in the lamp.

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Explanation 2 marks

An object is placed beyond 2F (further than twice the focal length) in front of a convex lens. State two characteristics of the image formed.

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Explanation 3 marks

A car of mass 1200 kg accelerates uniformly from 8 m/s to 20 m/s in 4 s. Calculate the resultant force acting on the car.

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Explanation 3 marks

A stone of mass 0.5 kg is dropped from rest at a height of 8 m above the ground. Taking g = 10 m/s² and ignoring air resistance, calculate the kine...

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Explanation 3 marks

An ideal (100% efficient) transformer steps 240 V down to 12 V and supplies a secondary current of 2 A. Calculate the current in the primary coil.

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Explanation 3 marks

Explain briefly why a metal drain cover feels colder to bare feet than the wooden floorboards beside it, even though a thermometer shows both are a...

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