Resistance (Grade 10 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What causes resistance in a conductor?
What causes resistance in a conductor?
Electrons colliding with particles
What is the unit of resistance?
What is the unit of resistance?
Ohm ()
Why does a mobile phone charger become warm while charging?
Why does a mobile phone charger become warm while charging?
Resistors convert electrical to heat energy
Why does a lightbulb filament glow white-hot?
Why does a lightbulb filament glow white-hot?
High resistance transfers energy as heat
Why are fluorescent bulbs more efficient than incandescent bulbs?
Why are fluorescent bulbs more efficient than incandescent bulbs?
They use gases with much less resistance
What happens to resistance when the length of a resistor is doubled?
What happens to resistance when the length of a resistor is doubled?
Resistance typically doubles
What happens to resistance when cross-sectional area increases?
What happens to resistance when cross-sectional area increases?
Resistance decreases by the same factor
At what temperature do most superconductors work?
At what temperature do most superconductors work?
Below -140°C
Why do batteries go flat?
Why do batteries go flat?
Chemical energy is fully converted