Question

The RC charging circuit in a camera flash unit has a voltage source of 275 V and a capacitance of 125 Î¼F. (a) Find its resistance R if the capacitor charges to 90.0% of its final value in 15.0 s. (b) Find the average current delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.00 ms.

Name: the rc charging circuit in a camera flash unit has a voltage source of 275 v and a capacitance of 125 f a find its resistance r if the capacitor charges to 900 of its final value in 150 s b 82746
Uploaded: 2023-07-05T19:27:35-08:00
Duration: 2 min 25 s
Channel: Adi S
Description: the rc charging circuit in a camera flash unit has a voltage source of 275 v and a capacitance of 125 f a find its resistance r if the capacitor charges to 900 of its final value in 150 s b 82746

          The RC charging circuit in a camera flash unit has a voltage source of 275 V and a capacitance of 125 Î¼F. (a) Find its resistance R if the capacitor charges to 90.0% of its final value in 15.0 s. (b) Find the average current delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.00 ms.

Added by Daniel M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

07/05/2023

Step 1

0 s. The formula for the voltage across the capacitor as a function of time is: V(t) = V_source * (1 - e^(-t/τ)) We can plug in the values we know: 0.9 * V_source = V_source * (1 - e^(-15/τ)) Now we can solve for τ: 0.9 = 1 - e^(-15/τ) 0.1 = e^(-15/τ) ln(0.1) Show more…

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The RC charging circuit in a camera flash unit has a voltage source of 275 V and a capacitance of 125 Î¼F. (a) Find its resistance R if the capacitor charges to 90.0% of its final value in 15.0 s. (b) Find the average current delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.00 ms.