Q1. Determine the range of adjustable resistance, Rx for a Wheatstone bridge circuit as shown in Figure Q1 that can measure voltage at range between 0 to 10 V. The voltage source is 50 V and fixed resistances, R1 = R2 = R3 = 1 KN, next, determine the range of current can be measured by using galvanometer with internal resistance is 2002. A R2 R, No B E D. Rx R3 Figure Q1

if the resistor R1 and R2 terminals are connected across each and R3 is connected along single terminal. If the R1=5 R2=10 and R3=15 ohms, what will be the Rtotal?

Three wires are connected at a branch point. One wire carries a positive current of 13 A into the branch point, and a second wire carries a positive current of 3 A away from the branch point. Find the current carried by the third wire into the branch point.

4-5) Before the advent of ohmmeters (even the analog ones), unknown resistances (Runk) were measured using a Wheatstone bridge. The unknown resistance is placed into the circuit at right as shown. The values of R1 and R2 are extremely well known. The resistance of Rvar is adjusted until the meter Runk. Rvar R1. R2 reads no current in the cross branch. The value of Rvar is then read from a dial. Show that Runk can be found from R1 -Ry Rukn

What resistance must be connected in series with a 100-N resistor for the 100-0 resistor to produce heat at the rate of 30 W when the combination is connected to a 120-V source?