Question

PRE-LABORATORY ASSIGNMENT 1. When the Wheatstone bridge in Figure 29-1 is balanced, which of the following statements are true? (More than one may be true.) (a) There is no current in the unknown resistor. (b) There is no current in the galvanometer. (c) There is no voltage drop across the galvanometer. (d) The currents in R1 and R3 are the same. (e) The currents in R1 and R2 are the same. (f) The voltage across R1 and R3 is the same. (g) The voltage across R1 and R2 is the same. 2. The slide-wire form of the Wheatstone bridge makes use of the fact that (a) the resistance of a wire is equal to its length; (b) the resistance of a wire is proportional to its cross-sectional area; (c) the resistance of a wire is proportional to its length; (d) the resistance of a wire is inversely proportional to its length. 3. A slide-wire Wheatstone bridge is used in the configuration shown in Figure 29-2 with the known resistor positioned as shown and equal to 10.00 ?. The balance point is found to be at the position of 35.7 cm for the scale as shown in the figure. What is the value of the unknown resistance Ru? Show your work. Ru = ________ ? 4. Does the measurement of resistance using the Wheatstone bridge depend upon the value of the power supply voltage used? If it does, explain why, and if it does not, then explain why not. 5. What is the purpose of the 10 k? resistor in parallel with the switch that is in series with the galvanometer in Figure 29-2?

          PRE-LABORATORY ASSIGNMENT
1. When the Wheatstone bridge in Figure 29-1 is balanced, which of the following statements are true?
(More than one may be true.) (a) There is no current in the unknown resistor. (b) There is no current in the
galvanometer. (c) There is no voltage drop across the galvanometer. (d) The currents in R1 and R3 are
the same. (e) The currents in R1 and R2 are the same. (f) The voltage across R1 and R3 is the same. (g) The
voltage across R1 and R2 is the same.
2. The slide-wire form of the Wheatstone bridge makes use of the fact that (a) the resistance of a wire is
equal to its length; (b) the resistance of a wire is proportional to its cross-sectional area; (c) the resistance
of a wire is proportional to its length; (d) the resistance of a wire is inversely proportional to its length.
3. A slide-wire Wheatstone bridge is used in the configuration shown in Figure 29-2 with the known
resistor positioned as shown and equal to 10.00 ?. The balance point is found to be at the position
of 35.7 cm for the scale as shown in the figure. What is the value of the unknown resistance Ru?
Show your work.
Ru = ________ ?
4. Does the measurement of resistance using the Wheatstone bridge depend upon the value of the
power supply voltage used? If it does, explain why, and if it does not, then explain why not.
5. What is the purpose of the 10 k? resistor in parallel with the switch that is in series with the
galvanometer in Figure 29-2?

PRE-LABORATORY ASSIGNMENT
1. When the Wheatstone bridge in Figure 29-1 is balanced, which of the following statements are true?
(More than one may be true.) (a) There is no current in the unknown resistor. (b) There is no current in the
galvanometer. (c) There is no voltage drop across the galvanometer. (d) The currents in R1 and R3 are
the same. (e) The currents in R1 and R2 are the same. (f) The voltage across R1 and R3 is the same. (g) The
voltage across R1 and R2 is the same.
2. The slide-wire form of the Wheatstone bridge makes use of the fact that (a) the resistance of a wire is
equal to its length; (b) the resistance of a wire is proportional to its cross-sectional area; (c) the resistance
of a wire is proportional to its length; (d) the resistance of a wire is inversely proportional to its length.
3. A slide-wire Wheatstone bridge is used in the configuration shown in Figure 29-2 with the known
resistor positioned as shown and equal to 10.00 ?. The balance point is found to be at the position
of 35.7 cm for the scale as shown in the figure. What is the value of the unknown resistance Ru?
Show your work.
Ru = ?
4. Does the measurement of resistance using the Wheatstone bridge depend upon the value of the
power supply voltage used? If it does, explain why, and if it does not, then explain why not.
5. What is the purpose of the 10 k? resistor in parallel with the switch that is in series with the
galvanometer in Figure 29-2?

Added by Kevin T.

Question

Please give Ace some feedback