Electricity so far

Which way does conventional current travel around a circuit?

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• 

The current in a series circuit is:

• Split proportionally based on the resistance of the components

• The same everywhere

• Less after each component within the circuit

• Measured in Coulomb seconds

Which of these are false (tick all that apply)?

• 1. Each branch of a parallel circuit receives the maximum cell voltage.

• In a parallel circuit with multiple bulbs, if one breaks all of the other bulbs will be affected

• 1. Within a branch of a parallel circuit, the current is always the same.

• The current in a parallel circuit splits in half between different paths

What is the total potential difference across these components?

What is the potential difference across each of these components?

A filament bulb is labelled '3.0 V, 0.75 W'. Calculate its current at 3V:

A filament bulb is labelled '3.0 V, 0.75 W'. Calculate its resistance at 3V:

What component is this the current/voltage graph for?

• NTC Thermistor

• Lamp

• Diode

• LED

What are these components?

• A - diode B - resistor C - thermistor D - variable resistor

• A - LED B - resistor C - light dependent resistor D - thermistor

• A - diode B - resistor C - light dependent resistor D - variable resistor

• A - LED B - resistor C - variable resistor D - thermistor

A wire of uniform diameter 0.28mm and length 1.50 m has a

resistance of 45 Q. Calculate its resistivity:

• 1.8E-6 Ωm

• 7.4E-6 Ωm

• 1.85 Ωm

• 7.4E-8 Ωm