Question 121
A coil of wire with a current produces a magnetic field around it. What happens to the magnetic field if the current is reversed?Electricity and magnetismMagnetism - Electromagnetismmedium
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NSC Physical Sciences – South Africa
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Question 122
Which phenomenon explains why a prism splits white light into different colors?Waves and opticsOptics - Dispersionmedium
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Question 123
Which organic compound is classified as an alkane?Organic chemistryHydrocarbons - Alkanes and derivativeshard
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Question 124
What is the unit of electric current in the International System of Units (SI)?Electricity and magnetismElectricity and magnetismeasy
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Question 125
What type of bond is primarily responsible for the high melting point of ionic compounds?Matter and materialsMatter and materialsmedium
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Question 126
Which phenomenon explains the bending of light as it passes from one medium to another?Waves and opticsWaves and opticseasy
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Question 127
During an exothermic chemical reaction, what happens to the energy?Chemical changeChemical changeeasy
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Question 128
Which organic compound functional group is characterized by a carbon double-bonded to oxygen and single-bonded to a hydroxyl group?Organic chemistryOrganic chemistrymedium
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Question 129
A car accelerates uniformly from rest to 20 m/s in 5 seconds. What is its acceleration?MechanicsMechanicsmedium
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Question 130
In an electrical circuit, what effect does increasing resistance have on current if voltage is constant?Electricity and magnetismElectricity and magnetismmedium
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