Answer the following Problems: 1. An 800 mA current is passing through a resistor. The voltage applied to the resistor is 5.0 V. What is the value of the resistance of the resistor? 2. A resistor has a resistance of 3.20 k2. A voltage of 12.0 V is applied across the resistor. What is the value of the current through the resistor? 3. The resistance of a household water heater is 25.0 Ohms. If the current passing through the heater is 4.40 A, what is the voltage applied? 4. In one home audio system, the wires connecting a speaker to the stereo is 20.0 m long. To keep the losses low, we need to ensure that the resistance is no more than 0.10 Ohms per wire. If we use copper wire, a) What cross-sectional area should the copper wire have? b) What is the radius of the copper wire?
Answer the following Problems: 1. An 800 mA current is passing through a resistor. The voltage applied to the resistor is 5.0 V. What is the value of the resistance of the resistor? 2. A resistor has a resistance of 3.20 k2. A voltage of 12.0 V is applied across the resistor. What is the value of the current through the resistor? 3. The resistance of a household water heater is 25.0 Ohms. If the current passing through the heater is 4.40 A, what is the voltage applied? 4. In one home audio system, the wires connecting a speaker to the stereo is 20.0 m long. To keep the losses low, we need to ensure that the resistance is no more than 0.10 Ohms per wire. If we use copper wire, a) What cross-sectional area should the copper wire have? b) What is the radius of the copper wire?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:Answer the following Problems:
1. An 800 mA current is passing through a resistor. The voltage applied to
the resistor is 5.0 V. What is the value of the resistance of the resistor?
2. A resistor has a resistance of 3.20 k2. A voltage of 12.0 V is applied
across the resistor. What is the value of the current through the resistor?
3. The resistance of a household water heater is 25.0 Ohms. If the current
passing through the heater is 4.40 A, what is the voltage applied?
4. In one home audio system, the wires connecting a speaker to the stereo
is 20.0 m long. To keep the losses low, we need to ensure that the
resistance is no more than 0.10 Ohms per wire. If we use copper wire,
a) What cross-sectional area should the copper wire have?
b) What is the radius of the copper wire?
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