Ph 203: General Physics III 1/14/2019Chapter 20 Worksheet 1Ohm’s Law & Electrical Circuits:1. Consider the following circuit:a. What is the equivalent resistance of this circuit?b. How much total current is drawn from the battery?c. How much total power is utilized by the circuit? d. If the circuit is connected for 10 minutes, how much energy is drawn from the battery? e. How much charge? f. How many electrons?5 +-5 10 10 10 10 10 VPh 203: General Physics III 1/14/2019Chapter 20 Worksheet 22. Consider the following circuit:a. What is the equivalent resistance of this circuit?b. How much total current is drawn from the battery?c. How much current is flowing through each resistor? d. How much power is dissipated across resistor R? e. Resistor R has cylindrical geometry, with a resistivity  = 3.5 x 10-5 .m and length of 5.0x10-3 m. What is the cross sectional area of the resistor?+-10 R = 10 5 10 20 V20 Ph 203: General Physics III 1/14/2019Chapter 20 Worksheet 33. Consider the following circuit:a. What is the current through the 20  resistor?b. What is the current through the 10  resistor?Capacitors & RC Circuits:3. Consider a spherical cell of radius 0.5 x 10-6 m. The membrane of the cell has capacitive properties no different that the electrolytic capacitors used in the lab. For this cell, the resting membrane potential (potential difference across the cell) is 90 mV and the capacitance per unit surface area is 0.01 F/m2.a) What is the capacitance of the cell?b) How much charge is stored on each face of the membrane?c) How much energy is stored in the cell membrane?20 10 10 V+ -+ -5 VRPh 203: General Physics III 1/14/2019Chapter 20 Worksheet 4d) If the dielectric constant for the cell membrane is k = 5.65, what is the thickness of the cell membrane?4. Consider the following RC circuit.a) What is the equivalent capacitance for this circuit?b) What is the RC time constant for this circuit? c) What is the significance of this constant?d) If the battery is removed from the circuit and the capacitors are allowed to discharge, how long would it take for the charge in the capacitor to be 20% of the fully charged value?e) What would be the potential difference across the discharged capacitor?+-20 F1000 10 V10 F15