Problem 1: Lathe three-resistor circuit diagram shown at right, R1 = 4.5 9,122 = 1'3 52, R3 = 8.59, and 17:23 V. Part (:1) Enter an expression for the equivalent resistance, leaul, of the two resistors in parallel. Expression : Rparallel : Select from the variables below to write your expression. Note that all variables may not be required. a, I}, 9, c, d, g, h, In, P, R1, R2, R3, Req, t, V Part (II) Enter an expression for the equivalent resistance, Req, of the whole circuit. Expression : RH]: Select from the variables below to write your expression. Note that all variables may not be required. a, B, 9, c, d, g, h, m, P, R1, R2, R3, Req, t, V Part (c) Given the equivalent resistance R Expression : I : Eq= Select from the variables below to write your expression. Note that all variables may not be required. a, [3, 9, c, d, g, h, m, P, R1, R2, R3, Ball, 1, V Part (:1) Calculate the current, I, in arnperes. Numeric : A numeric value is expected and not an expression. I: enter an expression for the current, I, through the circuit. (9 Gthcerpcrttaxmn Problem 2: Consider the circuit diagram in the figure. E1 = 18 V d 0.5 0 2.5 0 12 a 6.0 0 1.5 0 h g 0.5 0 E, = 45 V Otheexpertta.com Part (a) What is the equation which results when applying the loop rule to loop aedcba, in terms of the variables given in the figure? Expression : 0 = Select from the variables below to write your expression. Note that all variables may not be required. 61: a, B. 0. d, g: h, I1= 12: m. P, r1: R1: R2. t Part (b) If the current through the middle part of the loop is 1 = 4.75 amps, what is the current through the top loop, I2, in amps? Numeric : A numeric value is expected and not an expression. I, =Problem 3: Three RC circuits are constructed using identical batteries and switches, but different arrangements of identical resistors and identical capacitors are used, as shown. The switch is initially open, and the capacitors are initially uncharged. Vo Co Vo Co Co Vo- Ro Ro Ro Ro Co (left) (center) (right) If T represents the time required from the closing of the switch for an RC circuit to become 90% charged, then rank the charging times for the three circuits. Multiple Choice : 1) Tleft = Tcenter = Tright ) Tright = [left = Icenter 3) Tleft > Icenter = Fright 4) [center > Fright > Fleft 5) [center ~ [left TrightProblem 4: A R = 638 2 resistor, an uncharged C = 137 uF capacitor, and a = = 5.12 Vemf are connected in series. Part (a) What is the initial current in amps? Numeric : A numeric value is expected and not an expression. 10 = Part (b) What is the RC time constant in seconds? Numeric : A numeric value is expected and not an expression. T= Part (c) What is the current after one time constant in amps? Numeric : A numeric value is expected and not an expression. I = Part (d) What is the voltage on the capacitor after one time constant in volts? Numeric : A numeric value is expected and not an expression. Vc=Problem 5: A 0. 02252 ammeter is placed in series with a 10. 552 resistor in a circuit. Part (:1) Calculate the resistance, in ohms, of the combination. Numeric :A numeric value is expected and not an expression. R5 = Part {b} If the voltage is kept the same across the combination as it was through the 11159 resistor alone, what is the percent decrease in current? Numeric :A mimetic value is expected and not an expression. (Io-1330 (9'5) = Part (c) ['E'the current is kept the same through the combination as it 1was through the 1115-9 resistor alone, what is the percent increase in voltage? Numeric :A numeric value is expected and not an expression. ail/IV". (3'0) =