Current
What is electric current?
Electric current is the flow of electric charge in a circuit.
What is voltage?
Voltage is the measure of electric potential difference between two points in a circuit.
What is resistance?
Resistance is a measure of the opposition to the flow of electric current in a conductor.
What is electrical power?
Electrical power is the rate at which electrical energy is transferred by an electric circuit.
What is a series circuit?
A series circuit is a circuit in which all components are connected end-to-end, so that current flows through each component in turn.
Define conventional current.
Conventional current is the flow of positive charge from the positive terminal to the negative terminal.
What is the unit of voltage?
The unit of voltage is the volt (V).
What is the unit of resistance?
The unit of resistance is the ohm (Ω).
What is the unit of power?
The unit of power is the watt (W).
What is a parallel circuit?
A parallel circuit is a circuit where components are connected across common points or junctions, providing multiple paths for current.
What is the unit of current?
The unit of current is the ampere (A).
Explain the concept of potential difference.
Potential difference is the work done to move a unit charge between two points in an electric field.
State Ohm's Law.
Ohm's Law states that V=I⋅RV=I⋅R.
How do you calculate power?
Power can be calculated using the formula: P=V⋅IP=V⋅I.
Describe the characteristics of series circuits.
In series circuits, the current is the same through all components, the total voltage is the sum of the voltages across each component, and if one component fails, the circuit is broken.
Describe the direction of current flow.
Current flows from the positive terminal to the negative terminal in a circuit.
What is the relationship between voltage and current?
The relationship is described by Ohm's Law: V=I⋅RV=I⋅R, where VV is voltage, II is current, and RR is resistance.
What factors affect resistance?
Factors include the material, length, cross-sectional area, and temperature of the conductor.
What is the relationship between power and current?
Power is directly proportional to the product of voltage and current: P=V⋅IP=V⋅I.
Describe the characteristics of parallel circuits.
In parallel circuits, the voltage is the same across all components, the total current is the sum of the currents through each component, and if one component fails, the circuit remains functional.
How is current related to charge?
Current is the rate of flow of charge: I=QtI=tQ, where II is current, QQ is charge, and tt is time.
How do you calculate voltage in a circuit?
Voltage can be calculated using Ohm's Law: V=I⋅RV=I⋅R.
How do you calculate total resistance in series?
Total resistance in series is the sum of individual resistances: Rtotal=R1+R2+R3+…Rtotal=R1+R2+R3+….
What is the formula for power in a circuit?
The formula for power can also be expressed as P=I2⋅RP=I2⋅R or P=V2RP=RV2.
How do you calculate total current in a parallel circuit?
The total current in a parallel circuit is the sum of the currents through each branch: Itotal=I1+I2+I3+…Itotal=I1+I2+I3+….