EGR203 Electric/Electronic Circuits Assignment 1 (b)

  1. Given the following circuit, use mesh analysis to find ia, ib. ic. and Vx. (Rizzoni 2.55)

    R0R1 R2 R3Vs
    2 Ω1 Ω4/3 Ω6 Ω12 V

  2. Repeat the previous problem given (Rizzoni 2.56):

    R0R1 R2 R3Vs
    2 Ω2 Ω5 Ω4 Ω24 V

    Note the minor typo in Rizzoni 2.56 and 2.57.

  3. Assume that the voltage source in the previous circuit is now replaced by a current source. Determine the currents ia, ib. ic. and voltages Vx and Vy. (Rizzoni 2.57):

    R0R1 R2 R3Is
    1 Ω3 Ω2 Ω4 Ω12 A

  4. Find the equivalent resistance of the circuit below by combining resistors in series and parallel. Assume R0 = 4 Ω, R1 = 12 Ω, R2 = 8 Ω, R3 = 2 Ω, R4 = 16 Ω, and R5 = 5 Ω. (Rizzoni 2.59)

  5. Find the equivalent resistance of the circuit below and the current I. Assume VS = 12 V, R0 = 4 Ω, R1 = 2 Ω, R2 = 50 Ω, R3 = 8 Ω, R4 = 10 Ω, R5 = 12 Ω, and R6 = 6 Ω. (Rizzoni 2.60)

  6. Your resistor is color coded yellow-violet-red. What is its nominal resistance?

  7. Suppose we measured a resistance of about 1.4 Ω across a graphite stick, used calipers to measure the cross-section of the stick (7 mm by 5 mm) and measured the distance between the multimeter test leads (54 mm). Based on these measurements, calculate the bulk resistivity of the graphite stick.

  8. Given a resistor of 80 Ω connected to a 12 V battery, find the power absorbed by the resistor. What are the consequences if the resistor is rated at one-quarter watt?

  9. Suppose we have a 330-Ω resistor rated at one-half watt. What is the maximum voltage we can apply to the resistor without exceeding its power rating?

  10. Suppose your multimeter is fused for 300 mA. You want to measure current through a resistor via a 9-volt battery. What is the minimum resistance such that the current is less than 150 mA?

Maintained by John Loomis, last updated 8 September 2014