6. In the following circuit: 24 2 11V 37 0 Solve for a) the total resistance, b) the total current, c) the voltage drop across the 24 Ohm resistor and d) the voltage drop across the 37 Ohm resistor. b)

6. In the following circuit: 24 2 11V 37 0 Solve for a) the total resistance, b) the total current, c) the voltage drop across the 24 Ohm resistor and d) the voltage drop across the 37 Ohm resistor. b)

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 59P: The power dissipated by a resistor with a resistance of R=100 is P = 2.0 W . What are the current...

See similar textbooks

Similar questions

Integrated Concepts A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg. °C, assuming no heat escapes?
The [R drop across a resistor means that there is a change in potential or voltage across the resistor. Is there any change in current as it passes through a resistor? Explain.
Three identical 60.0-W, 120-V lightbulbs are connected across a 120-V power source as shown in Figure P28.72. Assuming the resistance of each lightbulb is constant (even though in reality the resistance might increase markedly with current), find (a) the total power supplied by the power source and (b) the potential difference across each lightbulb.
Suppose you measure the terminal voltage of a 3.2G0-V lithium cell having an internal resistance of 5.00 by placing a 1.00-k voltmeter across its terminals, (a) What current flows? (b) Find the terminal voltage, (c) To see how close the measured terminal voltage is to the emf, calculate their ratio.
The power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance increases. Yet this power is also given by P = I2R, which means power increases if resistance increases. Explain why there is no contradiction here.
Consider the circuit shown in the preceding problem. Write equations for the power supplied by the voltage sources and the power dissipated by the resistors in terms
How does the resistance for copper and for silicon change with temperature? Why are the behaviors of these two materials different?
An electronic apparatus may have large capacitors at high voltage in the power supply section, presenting a shock hazard even when the apparatus is switched off. A “bleeder resistor" is therefore placed across such a capacitor, as shown schematically in Figure 21.50, to bleed the charge from it after the apparatus is off. Why must the bleeder resistance be much greater than the effective resistance of the rest of the circuit? How does this affect the time constant for discharging the capacitor?
How is the I R drop in a resistor similar to the pressure drop in a fluid flowing through a pipe?
An automobile starter motor has an equivalent resistance of 0.0500 and is supplied by a 12.0-V battery with a 0.0100- internal resistance, (a) What is the current to the motor? (b) What voltage is applied to it? (c) What power is supplied to the motor? (d) Repeat these calculations for when the battery connections are corroded and add 0.0900 to the circuit. (Significant problems are caused by even small amounts of unwanted resistance in low-voltage, high-current applications.)
Integrated Concepts (a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 102 -g aluminum cup containing 350 g of water from 20.0°C to 95.0°C in 2.00 min. Find its resistance, assuming it is constant during the process. (b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
Why should you not connect an ammeter directly across a voltage source as shown in Figure 21.48? (Note that script E in the figure stands for emf.)