6a- Unit Magnetism and electromagnetism

Question 1

symbole for electric current

Answer 1

Electric Current

Ampere

A

Question 2

symbole for voltage

Answer 2

Voltage (Potential Difference)

Volt

V

Question 3

symbole for power

Answer 3

Power

Watt

W

Question 4

what does the unit ampere

Answer 4

Ampere (A): Measures electric current, which is the rate of flow of charge.

Question 5

what does the unit Volt

Answer 5

Volt (V): Measures voltage (potential difference), which is the energy per unit charge.

Question 6

what does the unit Watt

Answer 6

Watt (W): Measures power, which is the rate of energy transfer.

Question 7

ogm’s law equation

Answer 7

Ohm’s Law:
V= IR
(Voltage = Current × Resistance)

Question 8

Power Equation:

Answer 8

P= VI
(Power = Voltage × Current)

Question 9

Alternative Power Equations

Answer 9

Alternative Power Equations:
P= I^2 R. (Power = Current² × Resistance)
P= V^2 / R (Power = Voltage² ÷ Resistance)

Question 10

Practical: Measuring Voltage, Current, and Power

Measuring Current in a Circuit

Answer 10

Method: Use an ammeter connected in series with the circuit.

Observation: The ammeter shows the current in amperes (A).

Question 11

Practical: Measuring Voltage, Current, and Power

Measuring Voltage Across a Component

Answer 11

Method: Use a voltmeter connected in parallel to measure potential difference.

Observation: The voltmeter displays voltage in volts (V).

Question 12

Practical: Measuring Voltage, Current, and Power

Calculating Electrical Power

Answer 12

Method: Measure voltage and current, then use to calculate power.

Observation: The power in watts (W) is obtained.