A 98-W lamp is placed in series with a resistor and a 120-V source. If the voltage across the lamp is 30 V, what is the resistance R of the resistor?
A 98-W lamp is placed in series with a resistor and a 120-V source. If the...
A 20.0- lamp and a
5.0- lamp are
connected in series and placed across a potential difference of
50.0 V. What is
a. the equivalent resistance of the circuit?
b. the current in the circuit?
c. the voltage drop across each lamp?
d.the power dissipated in each lamp?
A 120 V, 60 Hz power source is connected in series across an 800 Ω resistance and an unknown capacitance in series. The voltage drop across the resistor is 102 V. Find (a) the voltage drop across the capacitor; and (b) the reactance of the capacitor.
A circuit has an ac voltage source and a resistor and capacitor connected in series. There is no inductor. The ac voltage source has voltage amplitude 0.900 kV and angular frequency w = 20.0 rad/s. The voltage amplitude across the capacitor is 0.500 kV. The resistor has resistance R= 0.300 kΩ. Part A What is the voltage amplitude across the resistor? Part B What is the capacitance C of the capacitor? Part C Does the source voltage lag or lead the current? Part D What is the average...
An uncharged capacitor and a resistor are connected in series to a source of emf. If emf=9.00 V, capacitance=21.5 ?F, and resistance=127Ω, find (a) the time constant of the circuit. After 1.30 ms, find (b) the charge on the capacitor, (c) the voltage drop across the capacitor, (d) the voltage drop across the resistor, and (e) the current.
11. You have a 5 V power source, a 25 W resistor, a 50 W resistor, and some wire. You arrange the two resistors in series with the battery, what is the equivalent resistance of the circuit? What is the current flowing through each resistor and the battery (for the series circuit)? If you arrange the two resistors in parallel with the battery, what is the equivalent resistance of the circuit? What is the current flowing through each resistor and...
A resistor is placed in a circuit with an adjustable voltage source. The voltage across and the current through the resistor and the measurements are shown below. Estimate the resistance of the resistor (in 12). Voltage (V) 3000F 2400 1800 1200 600 Current (A) 10 2 4 6 8 X 12 Enter a number.
An inductor and a resistor are connected in series. When connected to a 60-Hz, 90-V (rms) source, the voltage drop across the resistor is found to be 46 V (rms) and the power delivered to the circuit is 12 W. (a) Find the value of the resistance. Ω (b) Find the value of the inductance. H
1. A resistor R and capacitor care connected in series with an AC voltage source with frequency f and maximum voltage Vo. a. Find the complex impedance (in the form Z = R + jX). If the impedance is written in polar form (Z = Zejº), find expressions for Z and Ⓡ. Write your answers in terms of the variables R, C, and o(= 21f). b. If the voltage source is described by the phasor V = V, ejwt, and...
A resistor is connected across a 220-V power source. If the power dissipated is 147 W, what current will flow through the resistor? What is the resistance of the resistor?
2. A resistor R and inductor L are connected in series with an AC voltage source with frequency fand maximum voltage Vo. a. Find the complex impedance (in the form Z = R + jX). If the impedance is written in polar form (Z = Zejo), find expressions for Z and Ø. Write your answers in terms of the variables R, L, and o(= 21f). b. If the voltage source is described by the phasor V = Voejut, and the...