Ohm's Law (Junior Cert Wood Technology): Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
Voltage definition
Voltage definition
Electric potential difference between two points in a circuit
Current definition
Current definition
Flow of electric charge through a conductor
Resistance definition
Resistance definition
How much a material resists the flow of current
Unit for measuring voltage
Unit for measuring voltage
Volts (V)
Unit for measuring current
Unit for measuring current
Amperes (A)
Unit for measuring resistance
Unit for measuring resistance
Ohms (Ω)
Ohm's Law formula
Ohm's Law formula
V = IR
Formula for current using Ohm's Law
Formula for current using Ohm's Law
I = V/R
Formula for resistance using Ohm's Law
Formula for resistance using Ohm's Law
R = V/I
Effect on current when voltage increases (R constant)
Effect on current when voltage increases (R constant)
Current increases
Effect on current when resistance increases (V constant)
Effect on current when resistance increases (V constant)
Current decreases
Function of battery in circuit
Function of battery in circuit
Provides voltage that drives current
Function of resistor in circuit
Function of resistor in circuit
Limits current flow based on its resistance
Application of Ohm's Law
Application of Ohm's Law
Designing and analysing circuits
Limitation of Ohm's Law
Limitation of Ohm's Law
Temperature affects resistance, complicating its simple use