2a-Units Flashcards
Electric Current symbole
Electric Current
unit Ampere
Symbole A
Charge unit and symbole
Charge
unit Coulomb
Symbole C
Energy unit and symbole
Energy
Joule
J
Resistance unit and symbole
Resistance
Ohm
Ω
time unit and symbole
Time
Second
s
Voltage (Potential Difference)
unit and symbole
Voltage (Potential Difference)
Volt
V
power unit and symbole
Power
Watt
W
What does the unit Ampere
represent?
Ampere (A): Measures electric current, which is the flow of charge per second.
What does the unit coulomb
represent?
Coulomb (C): Measures electric charge; 1 C = charge transferred by a current of 1 A in 1 second.
What does the unit joule
represent?
Joule (J): Measures energy; the work done or energy transferred.
What does the unit Ohm
represent?
Ohm (Ω): Measures resistance, which opposes electric current.
What does the unit Second
represent?
Second (s): Measures time.
What does the unit Volt
represent?
Volt (V): Measures voltage (potential difference), which is the energy per unit charge.
What does the unit Watt
represent?
Watt (W): Measures power, which is the rate of energy transfer.
Practical: Measuring Electrical Quantities
Measuring Current and Voltage in a Circuit
Method: Use an ammeter in series to measure current and a voltmeter in parallel to measure voltage.
Observation: Current remains constant in series but splits in parallel circuits.
Practical: Measuring Electrical Quantities
Investigating Resistance with a Variable Resistor
Method: Set up a circuit with a variable resistor and measure voltage and current.
Observation: Increasing resistance decreases current (Ohm’s Law).
