Resistance and V= IR

Created by

Jazz Parry

Cards (46)

How does electrical resistance compare to friction?
It slows down the flow of electric current
What is the unit of electrical resistance?
Ohm (Ω)
What does one ohm signify in terms of voltage and current?
One volt allows one ampere of current
If a light bulb has a resistance of 10Ω and 12V is applied, what is the current? 
2A
What is Ohm's Law?
V = IR, relating voltage, current, and resistance
If a circuit has a voltage of 10V and a resistance of 5Ω, what is the current?
2A
What is the current flowing through a heater with 15Ω resistance connected to 20V?
4/3 A
If a resistor has a resistance of 5Ω and a voltage of 15V is applied, what current flows through it?
3A
How does increasing voltage affect current if resistance remains constant?
It increases the current
How does increasing resistance affect current if voltage remains constant?
It decreases the current
If a circuit has a current of 0.5A and a resistance of 10Ω, what is the voltage? 
5V
What is the current in a circuit with 20V and 8Ω resistance?
5A
How does electrical resistance compare to friction?
It slows down the flow of electric current
What is the unit of electrical resistance?
Ohm (Ω)
What does one ohm signify in terms of voltage and current?
One volt allows one ampere of current
If a light bulb has a resistance of 10Ω and 12V is applied, what is the current?
2A
What is Ohm's Law?
V = IR, relating voltage, current, and resistance
If a circuit has a voltage of 10V and a resistance of 5Ω, what is the current? 
2A
If a resistor has a resistance of 5Ω and a voltage of 15V is applied, what current flows through it?
3A
How does increasing voltage affect current if resistance remains constant? 
It increases the current
How does increasing resistance affect current if voltage remains constant?
It decreases the current
If a circuit has a current of 0.5A and a resistance of 10Ω, what is the voltage? 
5V
What is the current in a circuit with 20V and 8Ω resistance?
5A
What is voltage in a circuit?
The electrical potential difference between two points
How is voltage related to current and resistance according to Ohm's Law?
Voltage is directly proportional to current and resistance
What is the voltage across a resistor with 25Ω and 0.8A current? 
20V
What is the voltage across a resistor with 15Ω and 2A current?
30V
What is the voltage across a resistor with 10Ω and 3A current? 
30V
What is electric current?
The flow of charge in a circuit
How does conventional current flow in relation to battery terminals?
From positive (+) to negative (-)
What direction does conventional current flow in a circuit diagram?
From positive (+) to negative (-)
How does current flow from a battery in a circuit?
It flows from positive terminal to negative terminal
What are the steps to apply Ohm's Law?
Write the formula: V = IR
Identify known variables
Solve for the unknown variable
If V = 12V and R = 4Ω, what is I?
I = 3A
If I = 5A and R = 2Ω, what is V?
V = 10V
If V = 24V and I = 3A, what is R?
R = 8Ω
What is the relationship between voltage, current, and resistance?
Voltage (V) is directly proportional to current (I) when resistance (R) is constant.
Voltage (V) is inversely proportional to resistance (R) when current (I) is constant.
What happens to voltage when current is doubled at constant resistance?
Voltage is doubled
What factors influence electrical resistance?
Material, temperature, length, cross-sectional area
How does length affect resistance?
Resistance is directly proportional to length