Ra 3. Unbalanced Wheatstone Bridge: select resistors for an unbalanced Wheatstone bridge (Figure 4) so that VTH = 2.9±0.1 V and RTH = 1.85±0.04 kQ (between A and B). Note: the error comes for the different values the resistors on your board, so use the actual values in your calculations when you compare them to the measurements. Hint: since point A is the ground, the potential at point A is QA = 0 V. To choose the resistors, conduct calculations and show that your choice works; the calculation must show explicitly all the voltage drops and potentials with reference to the ground. BV Riz Figure 4 B

How long willit take a charged 80 uF capactor to lose 37%% of its initial energy when it is allowed to discharge through a 45 O resistor? a. 3.58 ms O b. 1.66 ms Oc 1.79 ms O d. 0.51 ms Oe. 0.83 ms Next page Dage Introduction to Phys102> Jump to

What is the equivalent resistor between the terminals a and b if you replace R1 by 20 Ohm and R2 by 40 Ohm ? This combination of resistors goes to infinity by repeating itself. Write your answer in units of Ohm. No decimal points is necessary. Maximum od 4% of error is accepted in your answer. R1 R, R2 R2 b. R1 R,

a. If the actual resistances are not within the tolerable range, what could be the implications? b. Can a potentiometer be used as a fixed resistor? Why or why not? If it can be used as a fixed resistor, explain c. What is more convenient to use, fixed resistors or variable resistors? Defend your answer.

1. What is the voltage drop across each device? I=VR2. What is the current in the resistor [6-ohm]? Note: Draw another schematic showing combinations of resistance [if there is any]

4. In the circuit to the right, the four resistors all have a resistance of 22 and the battery supplies a potential difference of Vbat3D2.5V. If the battery current (lbat) is A, what is the electric potential at point P? R a. Vp= 2.5V b. Vp= 1.5V c. Vp= 1.0V d. Vp= -2.0V e. Vp= -0.5V R4

If three resistors connected in series to a battery. Suppose R, carries a current of 14.5A, R2 has a resistance of 7.5N, and R3 dissipates 55W of power. What is the voltage across R3 and Resistance of R3 ? 1. Voltage (in V) across R3 = and 2. Resistance (in Q) of R3 ||

1. Set up the network (circuit) as in Figure 4 with circuit parameters as indicated. 2. Keeping both sources active in the circuit. Measure V, the three currents I, , and I; and put the measured values in Table ( Procedure: It Vo Circuit Parameters I3 12 V VS1 Vs2 Ri I2 R2 10 V Vs2 R3 4.7 k2 5.6 k2 R3 10 k2 Fig. 4 R RR 3.

a) . The equivalent resistant seen by the source. b) The total current I. c) . . The voltage across the 2K resistor. 1 kN 1 kΩ> 4 kN 20V 3 kN 2 kN 6.6 kN

A. Determine the equivalent resistance fir the circuit.keep vaules in ohms B. Determine hiw much current the battery produces. keep vaules in amps C. Determine the voltage across R12 and R3; call these values V12 and V3, keep the vaules in volts. then usr ohms law: V=i r, to fkmd the current across R12 and R3; call tjese 12 and 13, keep these vaules in amps. D. use ohms law to caculare the voltages across R1 and R2; call these vaules V1 and V2, keep results in volts. Requivatont,scris= Sihi=R1 tket . kequivaknt, papli=Zi Ri =RI K You circuit are given the following below. combination Z Rz R3 where V is a 12 V battery; R1 is 330ohms R2 is 180 ohms R3 is 270 ohms please write all work legaie thanks :)