The RC charging circuit in a camera flash unit has a voltage source of 295 V and a capacitance of 141 µF. HINT (a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 15.2 s. Ω (b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.04 ms. A

If you wish to take a picture of a bullet traveling at 505 m/s, then a very brief flash of light produced by an RC discharge through a flash tube can limit blurring. Assuming 1.00 mm of motion during one RC constant is acceptable, and given that the flash is driven by a 610 µF capacitor, what is the resistance (in Q) in the flash tube? Ω

A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.0 V when it is delivering 22.0 W of power to an external load resistor R. (a) What is the value of R? Ω (b) What is the internal resistance of the battery? Ω

A RC circuit is constructed with a (initially uncharged) 5.00-µF capacitor and a 5.00- ohm resistor, which are connected in series to an ideal battery with emf 60.0 V. At a certain time after the circuit is connected, it is found that heat is being produced in the resistor at a rate of 300 W. How much energy is stored in the capacitor at that time (in Joules)? O None of these 1.8x104 1.13x10-3 3.75x10-3 9x10-3