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

What happens if a signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

- The output voltage is multiplied by 4
- The output voltage is divided by 4
- Additional resistance must be added in series with the primary to prevent overload
- Additional resistance must be added in parallel with the secondary to prevent overload

Which of the following components increases the total resistance of a resistor?

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

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?

What is the capacitance of three 100 microfarad capacitors connected in series?

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

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

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Which of the following components should be added to a capacitor to increase the capacitance?

Which of the following components should be added to an inductor to increase the inductance?

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Why is the conductor of the primary winding of many voltage step-up transformers larger in diameter than the conductor of the secondary winding?

- To improve the coupling between the primary and secondary
- To accommodate the higher current of the primary
- To prevent parasitic oscillations due to resistive losses in the primary
- To ensure that the volume of the primary winding is equal to the volume of the secondary winding

What is the value in nanofarads (nF) of a 22,000 picofarad (pF) capacitor?

What is the value in microfarads of a 4700 nanofarad (nF) capacitor?