WEEK OF 8/3/2014 QUESTIONS

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

A. Capacitive coupling

B. Displacement current coupling

C. Mutual inductance

D. Mutual capacitance

Which part of a transformer is normally connected to the incoming source of energy?

A. The secondary

B. The primary

C. The core

D. The plates

Which of the following components should be added to an existing resistor to increase the resistance?

A. A resistor in parallel

B. A resistor in series

C. A capacitor in series

D. A capacitor in parallel

What is the total resistance of three 100-ohm resistors in parallel?

A. .30 ohms

B. .33 ohms

C. 33.3 ohms

D. 300 ohms

If three equal value resistors in parallel produce 50 ohms of resistance, and the same three resistors in series produce 450 ohms, what is the value of each resistor?

A. 1500 ohms

B. 90 ohms

C. 150 ohms

D. 175 ohms

What is the equivalent capacitance of two 5000 picofarad capacitors and one 750 picofarad capacitor connected in parallel?

A. 576.9 picofarads

B. 1733 picofarads

C. 3583 picofarads

D. 10750 picofarads

What is the inductance of three 10 millihenry inductors connected in parallel?

A. .30 Henrys

B. 3.3 Henrys

C. 3.3 millihenrys

D. 30 millihenrys

What is the inductance of a 20 millihenry inductor in series with a 50 millihenry inductor?

A. .07 millihenrys

B. 14.3 millihenrys

C. 70 millihenrys

D. 1000 millihenrys