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 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.
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...
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...
If a Delta V_max = 115 V power source is placed across a resistor and the resulting current through the resistor is I_max = 1.6 A, what is the resistance? 63.34 ohms 71.88 ohms 80.24 ohms 75 76 ohms 88.93 ohms 72.28 ohms
A resistor with R = 350 Ω and an inductor are connected in series across an ac source that has voltage amplitude 500 V . The rate at which electrical energy is dissipated in the resistor is 306 W (a) What is the impedance Z of the circuit? (b) What is the amplitude of the voltage across the inductor? (c) What is the power factor?
A 10 Ω resistor is in series with a bulb and a 12V source. (a) Ir s.ov is across the bulb, what voltage is across the resisto? (b) What is the current in the circuit? (c) What is the resistance of the bulb? 68