Power, Energy, Efficiency & Resistors: Advanced Conceptual Assessment

In a circuit where voltage remains constant, how does increasing resistance affect power consumption?

• Power decreases quadratically
• Power increases linearly
• Power remains unchanged
• Power increases exponentially

Which scenario represents the most energy-efficient electrical system?

• High resistance with low current
• Low resistance with high current
• Maximum heat generation
• Constant power output regardless of conditions

When resistors are connected in parallel, what happens to the total circuit resistance compared to individual resistors?

• Resistance increases proportionally
• Resistance decreases
• Resistance remains constant
• Resistance becomes unpredictable

What fundamental relationship describes power in an electrical circuit?

• P = V × I
• P = R ÷ V
• P = E ÷ t
• P = I² × R

In a series circuit with multiple resistors, how does current behave?

• Current varies at each point
• Current is different for each resistor
• Current remains constant throughout
• Current depends on voltage only

Which factor most directly influences electrical efficiency?

• Total energy input divided by useful output
• Resistance of the circuit
• Voltage fluctuations
• Current magnitude

What occurs when voltage increases in a constant resistance circuit?

• Current remains unchanged
• Current increases proportionally
• Current decreases
• Circuit becomes unstable

How does temperature affect electrical resistance in most metallic conductors?

• Resistance decreases linearly
• Resistance increases linearly
• Resistance remains constant
• Resistance becomes erratic

Which mathematical relationship describes the energy stored in a capacitor?

• E = ½CV²
• E = P × t
• E = I × R
• E = V ÷ R

In a parallel circuit, what happens to voltage across each component?

• Voltage varies
• Voltage remains constant
• Voltage decreases proportionally
• Voltage becomes unpredictable