F2 - SEM1 - Circuit - 8.4 Resistance Flashcards
The electrical conductivity of a conductor is related to its ______________
Resistance
Resistance shows the opposition of conductor to the flow of current. It’s unit is ___________
Ohm Ω
A _________ is a circuit component with a certain value of resistance
Resistor
What does Resistance show?
8.4 Resistance
The opposition of a conductor to the flow of current
8.4 Resistance
What is the unit of resistance?
8.4 Resistance
Ohm (Ω)
8.4 Resistance
Which one conduct electricity better?
Low resistance
High resistance
8.4 Resistance
Low resistance
8.4 Resistance
What is the name of circuit component with a certain value of resistance?
8.4 Resistance
Resistor
8.4 Resistance
Draw component symbol
Resistor
8.4 Resistance
8.4 Resistance
In a simple circuit that only consists of a resistor connected to a cell, what happened to the current when resistance of the resistor increase?
8.4 Resistance
Current decrease
8.4 Resistance
What is the function of resistor?
8.4 Resistance
control the size of current
8.4 Resistance
What is the function of resistor in electrical appliance?
8.4 Resistance
Ensure the currents fit the needs of the circuits and are at safe value
8.4 Resistance
True or False?
Good conductors have low resistance
8.4 Resistance
True
8.4 Resistance
True or False?
A resistor is added to a circuit to increase the current flowing through it
8.4 Resistance
False
A resistor is added to decrease the current
8.4 Resistance
The resistance of a wire is depends on which 3 factors?
8.4 Resistance
- Length of wire: longer the wire, higher the resistance
- Thickness of wire: thinner the wire, higher the resistance
- Material of the wire: less conductivity of the wire, higher the resistance
8.4 Resistance
What is rheostat and its function?
8.4 Resistance
A resistor with an adjustable resistance
Use to adjust the current in a circuit
8.4 Resistance
