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Electrical Safety: Hazardous Currents

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Questions and Answers

What is the hazardous current above, in DC voltage at 50 V?

30 mA
25 mA (correct)
20 mA
10 mA

At what frequency are AC outlets typically operated in normal conditions?

60 Hz (correct)
100 Hz
50 Hz
30 Hz

What is the hazardous voltage of AC outlets under normal conditions?

130 V
110 V
100 V
120 V (correct)

Above what current is considered hazardous for AC outlets at 60 Hz?

10 mA (D) Signup and view all the answers

What is the purpose of considering hazardous voltages and currents?

To reduce the risk of electrical shock (B) Signup and view all the answers

What is the unit of measurement for electric current?

Ampere (C) Signup and view all the answers

What is the unit of measurement for electric potential difference?

Volt (C) Signup and view all the answers

What is the unit of measurement for electric power?

Watt (B) Signup and view all the answers

What is the unit of measurement for electric resistance?

Ohm (B) Signup and view all the answers

What is the relationship between Volts, Amps, and Watts?

Volts x Amps = Watts (D) Signup and view all the answers

Study Notes

DC voltages, currents above 25 mA at 50 V are considered hazardous under normal conditions. For common AC outlets (60 Hz, 120 V), current above 10 mA is considered hazardous under normal conditions.

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Description

Learn about the safety guidelines for electrical currents. Understand the hazardous current levels for DC and AC voltages under normal conditions.