Resistance (Grade 10 NSC Matric Physical Sciences): Flashcards
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Cause of resistance in conductors
Cause of resistance in conductors
Electrons colliding with particles, transferring kinetic energy
Unit of resistance
Unit of resistance
Ohms ()
Definition of 1 ohm
Definition of 1 ohm
One volt per ampere
Effect of increasing length on resistance
Effect of increasing length on resistance
Resistance increases proportionally
Effect of increasing cross-sectional area on resistance
Effect of increasing cross-sectional area on resistance
Resistance decreases
Formula relating resistance, length, and area
Formula relating resistance, length, and area
Energy conversion in resistors
Energy conversion in resistors
Electrical energy to heat energy
Why lightbulb filaments produce light
Why lightbulb filaments produce light
High resistance creates heat, making filament glow white-hot
Property of superconductors
Property of superconductors
No resistance at extremely low temperatures (below -140°C)
Why batteries go flat
Why batteries go flat
Chemical potential energy converted to other energy forms