WorksheetsElectric Current
Total questions: 23
Worksheet time: 13mins
What is this symbol for?
Which component is NOT part of simple cell?
Two electrodes
Electrolyte
Wires & load
Insulator cover
What does it means by reactive metal?
Electrode that easily dissolves and becomes anode.
Reduction will happen and becomes cathode.
Electrode losses electron and becomes thinner.
Electrode gains electron and becomes thicker
What is NOT observed when the chemical process starts?
Electrons flow from anode to cathode
Voltage exists between electrodes' terminal
Constant voltage obtained as long as charges flow continuously at external circuit
No changes on either electrode
Electric current is ____.
rate of flow of electrons in a conductor
rate of flow of protons in a conductor
moving electrons from + terminal to - terminal
moving charges that can move in two directions
Current is measured in __.
ampere
joule
Voltage is simply defined as __.
energy transformation
Which component that has this symbol?
Capacitor
Resistor
Inductor
LED
Choose which components have resistance based on the diagram given.
Battery & switch
Wire & bulb
Wire & battery
Bulb & switch
What equation links voltage, current and resistance
V = IR
V = CR
V = I/R
V = R/I
What is resistivity?
Property of materials
Property of electrical components
Inversely proportional to resistance
The unit of resistivity is
Ω/m
Ω/m2
Ω.m
Ω.m2
Area
Which metal has the highest resistivity?
Silver
Copper
Gold
Aluminum
Which one has the highest current flowing through it?
What is the effect of temperature on resistance in conductor?
The resistance increases as the temperature increases in conductors
The resistance decreases as the temperature increases in conductors
The resistance maintain even temperature increases
What is the energy change in simple cell?
Electrical energy to light energy
Light energy to chemical energy
Chemical energy to electrical energy
Electrical energy to chemical energy
A 120 W light bulb uses more ____________ than a 60 W light bulb.
kinetic energy
What does it mean if a bulb has a power of 50 W?
The bulb converts 50 J of electrical energy to light energy in 1 second.
The bulb converts 50 C of electrical charge to light energy in 1 second.
The bulb converts 50 J of electrical energy to sound energy in 1 second.
