Identifying non-power source symbols in circuits

Steps:

• Recall standard electrical symbols: power sources include batteries (parallel lines), cells (single line pair), and generators (circle with waves).
• Examine option A: matches battery symbol with long-short parallel lines.
• Examine option B: shows zigzag line, indicating resistance.
• Examine options C and D: C has sine wave in circle (AC source), D has single pair (cell).

Why B is correct:

• The zigzag symbol represents a resistor, which opposes current flow per Ohm's Law (V = IR), consuming rather than supplying power.

Why the others are wrong:

• A depicts a battery, providing DC voltage as a power source.
• C shows an AC generator, supplying alternating current.
• D represents a single cell, generating DC power via electrochemical reaction.

Final answer: B