What is the VDC in a circuit with 100 ohms and 0.1 A?

What is the VDC in a circuit with 100 ohms and 0.1 A?

• A. 1V
• B. 10V
• C. 0V
• D. 100V

Answer: (B)

Ohm's law ties voltage, current, and resistance together: V = I × R. In a DC circuit, the voltage across a resistor equals the current through it times its resistance. With 0.1 A through a 100 Ω resistor, V = 0.1 × 100 = 10 V. So the DC voltage is 10 volts. This stays the same as long as the current and resistance remain unchanged. The other values would require different current or resistance (e.g., 1 V would need 0.01 A through 100 Ω, 0 V would mean no current, and 100 V would require 1 A).

Ohm's law ties voltage, current, and resistance together: V = I × R. In a DC circuit, the voltage across a resistor equals the current through it times its resistance. With 0.1 A through a 100 Ω resistor, V = 0.1 × 100 = 10 V. So the DC voltage is 10 volts. This stays the same as long as the current and resistance remain unchanged. The other values would require different current or resistance (e.g., 1 V would need 0.01 A through 100 Ω, 0 V would mean no current, and 100 V would require 1 A).