Prepare for the Fire Controlmen A School Safety Test. Study with multiple choice questions, each with helpful hints and comprehensive explanations. Boost your confidence and readiness today!

Multiple Choice

Which statement is true about voltage and current in causing electric shock?

Electric shock happens when current actually flows through the body. Voltage is the potential difference that can push that current, but it’s the current itself—how much flows through the tissues and nerves—that produces the shock sensations and potential harm. The amount of current depends on both the voltage and the body's resistance (which varies with skin condition, moisture, and the path through the body), as described by Ohm’s law (I = V/R). That’s why a high voltage with a dry, high-resistance path might not deliver dangerous current, while a lower voltage with a wet or conductive path can produce a dangerous current. The direct cause of the physiological effects is the current, not the voltage alone. The other statements are incomplete or misleading because they attribute the shock to voltage alone or to both factors equally, whereas the current through the body is the controlling factor.

Electric shock happens when current actually flows through the body. Voltage is the potential difference that can push that current, but it’s the current itself—how much flows through the tissues and nerves—that produces the shock sensations and potential harm. The amount of current depends on both the voltage and the body's resistance (which varies with skin condition, moisture, and the path through the body), as described by Ohm’s law (I = V/R).

That’s why a high voltage with a dry, high-resistance path might not deliver dangerous current, while a lower voltage with a wet or conductive path can produce a dangerous current. The direct cause of the physiological effects is the current, not the voltage alone. The other statements are incomplete or misleading because they attribute the shock to voltage alone or to both factors equally, whereas the current through the body is the controlling factor.