A battery is rated that it provides 1.0 mW of power at 9.0 V when fully charged. How do you determine how much current can it deliver?

Why is the following situation impossible? An inquisitive physics student takes a 100-W incandescent lightbulb out of its socket and measures its resistance with an ohmmeter. He measures a value of 10.5 Ω. He is able to connect an ammeter to the lightbulb socket to correctly measure the current drawn by the bulb while operating. Inserting the bulb back into the socket and operating the bulb from a 120-V source, he measures the current to be 11.4 A.

A heart defibrillator being used on a patient has an RC time constant of 10.5 ms due to the resistance of the patient's body and the capacitance of the defibrillator. If the defibrillator has an 5.5 μF capacitance, what is the resistance of the path through the patient in kΩ? (You may neglect the capacitance of the patient's body and the resistance of the defibrillator.)

Suppose a resistor is rated in terms of the maximum number of Watts it can deliver without being damaged by heating. Suppose a 817 resistor has a rating of 4 W. What is the maximum current it can safely carry? Assume 3 significant figures and units of mA.

A 2.2-k Ω resistor is connected across a D cell battery (1.5 V). What is the current through the resistor?

The circuit below contains two real batteries, each having significant internal resistance. Battery #1 has an EMF of 6.00 V and an internal resistance of 1.00 ohm. Battery #2 has an EMF of 12.00 V and an internal resistance of 2.00 ohms. These two batteries are connected in series with two resistors R, = 6.00 ohms and R,= 3.00 ohms. ri d (6.00,V) (1.00 0) R1 (6.00 N) R2 (3.00 N) a r2 E2 (2.00 Q) (12.00 V) 18. The current in the 12.00 Volt battery is equal to C. 0.500 A. A. 0.750 A. B. 1.00 A. D. 2.00 A. E. 1.50 A. 19. The potential difference across the terminals of battery #1 from point C to point d is equal to C. 7.00 V. A. 5.50 V. B. 6.00 V. D. 5.00 V. E. 6.50 V. 20. The potential difference across the terminals of battery #2 from point a to point b is equal to C. 13.00 V. A. 14.00 V. В. 10.00 V. D. 11.0 V. E. 12.00 V.

Your car battery is dead, and your friends are helping you start your car with cheap jumper cables. One cable carries current from their car to your car, and a second cable returns that current to their car. As you try to start your car, a current of 80.0 A flows through the cables to your car and back, and a voltage drop of 6.00 V appears across each cable. If you replace the cheap cables with cables having half their electric resistance, what voltage drop will appear across each new cable if the current doesn't change? AV= i

4. A 12.0 V battery is connected to the resistor combination shown below. (a) How much current leaves the battery due to the resistors? (b) What is the current through each resistor? a 12 Q2 W R₁ R3 R₁ 692 w 692 692 www R₂ R₁ www 6Ω b

Giant electric eels can deliver a voltage shock of 5.00×102 V and up to 1.00 A of current for a brief time. What is the maximum power a giant electric eel can deliver to its prey during this time? maximum power:   W The body of a snorkeler swimming in salt water has a resistance of about 605 Ω. If the snorkeler is unfortunate enough to be struck by the eel, what current will flow through her body? current:     A A current of about 500 mA can cause heart fibrillation and death if it lasts too long. Is the current through the swimmer in this case large enough to be dangerous? yes no What power does the snorkeler receive from the eel? power: