Current Electricity
Physics ⇒ Electricity and Magnetism
Current Electricity starts at 8 and continues till grade 12.
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See sample questions for grade 9
Define electric power.
Describe the difference between a series and a parallel circuit.
Describe the function of a switch in an electric circuit.
Explain why a fuse is used in an electric circuit.
A 60 W bulb is connected to a 120 V supply. What is the current through the bulb?
A battery provides a potential difference of 9 V and a current of 0.3 A flows through a circuit. What is the resistance?
A circuit contains two resistors, 4 Ω and 6 Ω, connected in parallel. What is the total resistance?
A circuit contains two resistors, 4 Ω and 6 Ω, connected in series. What is the total resistance?
The resistance of a conductor depends on which of the following factors?
(1) Length
(2) Cross-sectional area
(3) Material
(4) All of the above
Which of the following equations represents electric power?
(1) P = IV
(2) P = I/R
(3) P = V/I
(4) P = IR
Which of the following is a non-ohmic conductor?
(1) Copper wire
(2) Filament lamp
(3) Silver wire
(4) Aluminum wire
Which of the following is a unit of electric charge?
(1) Ampere
(2) Coulomb
(3) Ohm
(4) Watt
Fill in the blank: The instrument used to detect the presence of electric current in a circuit is called a __________.
Fill in the blank: The potential difference between two points is measured in __________.
Fill in the blank: The reciprocal of resistance is called __________.
The device used to measure electric current is called a(n) __________.
Is the following statement true or false? The direction of conventional current is from the positive terminal to the negative terminal of a battery.
True or False: Electric current is the flow of electrons in a conductor.
True or False: In a parallel circuit, the total resistance is less than the smallest individual resistance.
True or False: In a parallel circuit, the voltage across each branch is the same.
