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NSC Physical Sciences – South Africa

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Question 101

Which circuit component is used to oppose the flow of electric current and is measured in ohms?
Electricity and magnetismElectricity - Components and their functionseasy

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Question 102

Which property best describes the ability of a material to return to its original shape after deformation?
Matter and materialsMatter - Mechanical properties of materialsmedium

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Question 103

A ray of light passes from air into glass at an angle of incidence of 30° and the refracted angle is 20°. What is the refractive index of glass relative to air?
Waves and opticsOptics - Refraction and refractive indexmedium

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Question 104

Which gas is produced when hydrochloric acid reacts with zinc metal?
Chemical changeChemical change - Reactions of acids with metalsmedium

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Question 105

In an electric circuit, if the voltage is doubled and the resistance stays the same, what happens to the current?
Electricity and magnetismElectricity - Ohm's Lawmedium

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Question 106

A metal rod of length 2 m expands by 0.001 m when heated. What is the coefficient of linear expansion if the temperature change is 50°C?
Matter and materialsMatter - Thermal expansionhard

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Question 107

Which of the following statements correctly describes Newton's First Law of Motion?
MechanicsMechanics - Newton's Lawseasy

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Question 108

A current of 3 A flows through a resistor of 4 Ω. What is the voltage across the resistor?
Electricity and magnetismElectricity - Ohm's Laweasy

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Question 109

What type of wave is a sound wave in air?
Waves and opticsWaves - Types of Waveseasy

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Question 110

Which property of a material primarily determines its ability to conduct electricity?
Matter and materialsMatter - Electrical Propertiesmedium

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