The resistance of each brake lightbulb on an automobile is  6.7 Ω.  Use the fact that cars have 12-V electrical systems to compute the current that flows in each bulb if they are connected in series. (For simplicity, assume that the circuit is only composed of one brake lightbulb and the car battery.)

Consider the circuit shown below. The resistor has R= 40 ohms and the capacitor has C= 6 x10^-6 F. Initially the switch is open and there is no charge on the capacitor and no current in the resistor. At a time after the switch is closed the current in the resistor is 2 A and the charge on the capacitor is q= +3.00 x 10^-4 C. What is the emf of the battery?

A 12.0 V battery is hooked up with three resistors (R1, R2, and R3) in parallel with resistances of 20.0 Ω, 75.0 Ω, and 100.0 Ω, respectively. Draw a labeled circuit diagram for the circuit described using correct symbols. (Use computer drawing tools or hand draw, scan and copy and paste.)   Calculate the equivalent resistance.     Calculate the current passing through each resistor in the circuit.

Please help: Your toaster has a power cord with a resistance of 2.1x10^-2 Ω connected in series with a 9.8 Ω nichrome heating element. The potential difference between the terminals of the toaster is 120 V. (A) How much power is dissipated in the power cord? Express your answer using two significant figures. (B) How much power is dissipated in the heating element? Express your answer using two dignicang figures.

Two resistors are connected in series in a circuit with a battery. The electromotive force (emf) of the battery is 3.0 volts. The resistances are 0.40 ohms and 1.85 ohms. (a) Determine the current I. Hint: The same current flows through both resistors. The voltage drop across the two resistors, i.e. IR₁ ✈ IR₂, is equal to the emf. (d) Determine the power in the first resistor. 1.78 W (e) Determine the power in the second resistor. 2.49 W

Four 20.0 W resistors are connected in parallel and the combination is connected to a 20.0 V ideal battery. The current in any one of the resistors is:

You have an aluminum bar of dimensions 2.0 cm × 5.0 cm × 10 cm. You want to insert it into an electric circuit so that it will have the smallest possible resistance.   Which pair of opposite faces should you connect to the circuit?