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18 questions
Electric current is defined as
detect electric current
negative terminal to positive terminal
positive terminal to negative terminal
the flow rate of electric charges through a conductor
Electric current flows from
detect electric current
negative terminal to positive terminal
positive terminal to negative terminal
the flow rate of electric charges through a conductor
Electrons flows from
detect electric current
negative terminal to positive terminal
positive terminal to negative terminal
the flow rate of electric charges through a conductor
Which light globe(s) would never light up?
A
B,C,D
A,B,C,D
None
Voltage is the measure of the...
difference in electrical energy between 2 parts of a circuit
amount of electric charge that flows through a circuit
If you increase the voltage across a resistor, what will happen to the current?
Current will increase
Current will decrease
Current will stay the same
An electric kettle is commonly used to heat up water at home. The heating element used is nichrome wire and not copper. Which of the following reasons best explains why nichrome is used instead of copper?
Nichrome conducts more current than copper, so more heat can be generated.
Nichrome has higher resistance than copper, so more heat can be generated.
Nichrome has higher voltage than copper, so more heat can be generated.
Nichrome are cheaper than copper, so it is more economical.
Which of the following materials is used in a light bulb to produce heat and light?
Nichrome
Copper
Tungsten
Steel
A higher resistance in a circuit causes a _____________.
higher voltage
larger current
smaller current
lower voltage
Which of the following is not a source of electrical energy?
ammeter
dry cell
mains
dynamo
What is resistance?
Flow of electrical charge
Pressure from power to push electrons
Limits the flow of electrons
What is voltage?
Flow of electrical charge
Pressure from power to push electrons
Limits the flow of electrons
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