Physical Quantities and Formulas Quiz

What unit is used to measure density?

Which formula correctly calculates mass?

What does the symbol 'I' represent in electrical terms?

The relationship V = I x R expresses which electrical concept?

Which of the following correctly defines resistance?

What unit is voltage measured in?

If substance A has a low density and substance B has a high density, which statement is correct?

What relationship does the formula E = P x T express?

Physical Quantities and Formulas

Density (D): Mass of a substance per unit volume. Measured in g/cm³. Formula: m/V (mass/volume)
Volume (V): Amount of space occupied by a substance. Measured in cm³.
Mass (m): Quantity of matter in a substance. Measured in grams (g).
Voltage (V): Electrical potential difference. Measured in Volts (V).
Resistance (R): Opposition to the flow of electric current. Measured in Ohms (Ω).
Current (I): Flow of electric charge. Measured in Amperes (A).
Energy (E): Capacity to do work. Measured in Joules (J).
Charge (Q): Amount of electric charge. Measured in Coulombs (C).
Time (t): Duration of an event. Measured in seconds (s).

Factors Affecting Resistance

Length: Shorter length results in lower resistance; longer length leads to higher resistance.
Thickness: Thicker material allows electrons to flow easily (lower resistance); thinner material restricts electron flow (higher resistance).
Temperature: Higher temperature leads to electrons moving faster (higher resistance); lower temperature means slower electron movement (lower resistance).

Test your knowledge on essential physical quantities and their formulas. This quiz covers important concepts such as density, volume, mass, and electrical properties like voltage and resistance. Assess your understanding of how these quantities interact and their measurement units.