A human being can be electrocuted if a current as small as 50 mA passes near the heart.  An electrician working with sweaty hands makes good contact with the two conductors he is holding, one in each hand.  If his resistance is 2,000 Ω, what might the fatal voltage be?

A circuit has three resistors (1 Ω, 2 Ω, and 3Ω) connected in series. What is the equivalent resistance of the circuit? Your answer should be in units of Ω but you should only submit the number for your answer.

See the attached picture. A fifteen (15) microfarad capacitor in series with a 130 kilo-ohm resistor is “charged” using a 12-volt battery. The switch is closed at time equals zero seconds. What is the time required for the capacitor to collect 50 microcoulombs of charge?

Three identical 100.0-W, 120-V lightbulbs are connected across a 120-V power source as shown in in the figure below. Assume that the resistance of each bulb is constant (even though in reality the resistance increases markedly with current). 120 V R₁ R₂ (a) Find the total power supplied by the power source. W = (b) Find the potential difference across each lightbulb. AV₁ AV₂ = AV₂ = Need Help? Read It R₂ V Master It