Impedance is a measure of the opposition to the flow of current in an electrical circuit. It consists of two parts called resistance and reactance. Light bulbs add resistance to an electrical circuit, and reactance occurs when electricity passes through coils of a wire like those found in electric motors. Impedance Z in ohms (?) may be expressed as a complex number, where the real part represents the resistance and the imaginary part represents the reactance. Use this information to solve the problem.The circuit contains two light bulbs and two electric motors. Find total impedance to the nearest tenth of an ohm by calculating the modulus of Z.
A. 79.3 ?
B. 85.4 ?
C. 33.1 ?
D. 52.5 ?
Answer: B
You might also like to view...
Find a1, d, an, n, or Sn for the arithmetic sequence, as instructed.a1 = 263, d = -10, an = 163; Find n.
A. 10 B. -15 C. 11 D. 9
Solve the problem.Southwest Dry Cleaners believes that it will need new equipment in 6 years. The equipment will cost $26,000. What lump sum should be invested today at 6% compounded semi-annually, to yield $26,000? Round to the nearest cent.
A. $18,235.88 B. $21,731.62 C. $21,894.60 D. $23,593.24
Choose the graph that satisfies the given conditions.Polynomial of degree 4 with two distinct x-intercepts and a negative leading coefficient
A. 
B. 
C. 
D. 
Use an integer or rational number to express the number representing change.The stock market lost 48 points on Monday.
A. 48 B. -48