91Ó°ÊÓ

A circuit has a resistance of \(11 \Omega\), a coil of inductive reactance \(120 \Omega\), and a capacitor with a \(120-\Omega\) reactance, all connected in series with a \(110-\mathrm{V}, 60\) -Hz power source. What is the potential difference across each circuit element?

A \(120-\mathrm{V}, 60-\mathrm{Hz}\) power source is connected across an \(800-\Omega\) noninductive resistance and an unknown capacitance in series. The voltage drop across the resistor is \(102 \mathrm{~V} .(a)\) What is the voltage drop across the capacitor? \((b)\) What is the reactance of the capacitor?

A coil of negligible resistance is connected in series with a \(90-\Omega\) resistor across a \(120-\mathrm{V}, 60-\mathrm{Hz}\) line. A voltmeter reads \(36 \mathrm{~V}\) across the resistance. Find the voltage across the coil and the inductance of the coil.

A step-down transformer is used on a \(2.2-\mathrm{kV}\) line to deliver \(110 \mathrm{~V}\). How many turns are on the primary winding if the secondary has 25 turns?

A step-down transformer is used on a \(1650-\mathrm{V}\) line to deliver \(45 \mathrm{~A}\) at \(110 \mathrm{~V}\). What current is drawn from the line? Assume 100 percent efficiency.

A step-up transformer operates on a \(110-\mathrm{V}\) line and supplies a load with \(2.0 \mathrm{~A}\). The ratio of the primary and secondary windings is \(1: 25 .\) Determine the secondary voltage, the primary current, and the power output. Assume a resistive load and 100 percent efficiency.