Electricity and Magnetism Flashcards
—⛒—
Bulb
—I I—
Cell
—Ⓐ—
Ammeter
—▭—
Resistor
—| I-| I—
Battery
—O—O—
Closed Switch
—Ⓥ—
Voltmeter
What is Current
How much electric charge flows through a circuit
What is Voltage
The force that pushes the electrons round the circuit
Potential Difference
The voltage between 2 different parts of a circuit
What is Resistance
The force acting against the current
What is current measured in
Amps (A)
What are the 3 things that affect resistance
Length, diameter and material of the wire
Formula for Resistance
Resistance = Voltage/Current
What is resistance measured in
Ohms (Ω)
What is voltage measured in
Volts (V)
Formula for voltage
Resistance x Current
Formula for current
Voltage/Resistance
If the voltage of a circuit is 10 V and the current is 0.5 A what is the resistance?
The resistance is 20 Ω
What is the current like in a series circuit
It is always the same
What is the current like in a parallel circuit
It is divided between branches of the circuit
Which type of circuit doesn’t need double plugging
Series Circuits dont need double plugging
Which type of circuit needs double plugging
Parallel Circuits require double plugging
If the resistance is 6 Ω and the voltage is 30 V what is the current
The current is 5 A
If the resistance is 7 Ω and the current is 14 A what is the voltage
The voltage is 98 V
If the voltage is 12 V and the current is 6 A what is the resistance
The voltage is 2 Ω
On a formula triangle where is the current
The current is on the bottom
On a formula triangle where is the voltage
The voltage is on the top
On a formula triangle where is the resistance
The resistance is on the bottom
