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Electric circuits (extension)
By Mr Pike
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Last updated 3 months ago
15 questions
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What is the main function of a resistor in an electric circuit?
To generate electricity
To increase voltage
To restrict the flow of current
To store electricity
True or false: In a parallel circuit, the total current is the sum of the individual currents through each component.
True
False
Which components can be used to vary the current in an electric circuit? Select all that apply.
Resistor
Ammeter
Switch
Variable resistor
What happens to the current in a series circuit if one of the components breaks?
The current increases
The current decreases
The current stops
The current remains the same
True or false: The voltage is the same at every point in a series circuit.
True
False
In a series circuit, if the resistance is doubled, the current will be...
Doubled
Halved
Unchanged
Quadrupled
What does the current in a circuit depend on? Select all that apply.
Voltage
Resistance
Temperature
Length of wire
What is the symbol for a cell in an electric circuit?
A circle
A rectangle
A line and a dashed line
Two parallel lines
True or false: The potential difference across a component in a parallel circuit is the same for each component.
True
False
When is electric power in a circuit dissipated? Select all that apply.
When it lifts a weight
When it goes through a resistor
When it charges a battery
When it lights a bulb
What is the unit for electric power?
Joule
Watt
Ampere
Volt
True or false: The power of an appliance increases if the voltage across it increases.
True
False
Which factors affect the resistance in a wire? Select all that apply.
Material
Length
Area
Temperature
What is the name of the rule used to calculate total resistance in a series circuit?
Ohm's law
Kirchhoff's law
Parallel law
Series law
True or False: In a series circuit, the total resistance is the sum of the individual resistances.
True
False