Ohms Law
What is the formula for ohms law?
V=IxR
In a series circuit, how does the total resistance compare to the individual resistances?
The total resistance is the sum of the individual resistances.
In a parallel circuit, how does the total current compare to the individual branch currents?
The total current is the sum of the individual branch currents.
What is the SI unit of electric current?
The SI unit of electric current is the ampere (A)
What is the definition of voltage?
Voltage is the difference in electric potential between two points.
If the resistance in a circuit is increased, what happens to the current?
The current decreases.
What happens to the brightness of bulbs in a series circuit if one of the bulbs goes out?
The other bulbs will also go out, so the brightness decreases.
What happens to the total resistance as more resistors are added in parallel?
The total resistance decreases.
What is the SI unit of voltage?
The SI unit of voltage is the volt (V)
What is an electric current?
It's the flow of electric charge through a conductor.
What is the SI unit of resistance?
Ohm (Ω).
In a series circuit, how does the current at each resistor compare to the total current?
The current at each resistor is the same as the total current.
If two resistors with values 3Ω and 6Ω are connected in parallel, what is the equivalent resistance?
=2Ω
What is the SI unit of resistance?
The SI unit of resistance is the ohm (Ω)
What is electrical power?
It's the rate at which electrical energy is transferred by an electric circuit.
If a 12V battery is connected to a circuit with a resistance of 4 ohms, what is the current in the circuit?
I = V/R = 12V/4Ω = 3A.
If three resistors with values 2Ω, 4Ω, and 6Ω are connected in series, what is the total resistance?
Total resistance = 2Ω + 4Ω + 6Ω = 12Ω.
What happens to the brightness of bulbs in a parallel circuit if one of the bulbs goes out?
The other bulbs remain lit, so the brightness stays the same.
What is the relationship between voltage, current, and resistance in an electric circuit, as described by Ohm's law?
the current flowing through a conductor between two points is proportional to the voltage across the two points and inversely proportional to the resistance between them
What is an insulator in terms of electricity?
An insulator is a material with high electrical resistance, which prevents or reduces the flow of electric current.
How does the resistance of a conductor change with an increase in temperature?
The resistance increases.
What happens to the total resistance in a series circuit as more resistors are added?
The total resistance increases.
In a parallel circuit, how does the voltage across each branch compare to the total voltage?
The voltage across each branch is the same as the total voltage.
What are the SI units for measuring electrical power?
he SI unit of electrical power is the watt (W), which can be expressed as volts times amperes (V x A) or as amperes squared times ohms
What is the definition of an ampere?
The ampere (A) is the base unit of electric current