A. Write the correct resistance and tolerance of the color bond resistors. Resistor Color Bond 1 Yellow-White-Blue-Silver 2 Green-Red-Red-No color 3 Blue-Green-Brown-Gold 4 Violet-Black-Orange-Silver 5 Gray-Black-Red-No color 6 White-Black-Blue-Gold 7 Red-Black-Brown-Silver 8 Orange-Yellow-Green-No color Blue-Violet-Gray-Gold White-Black-Gold-Silver 9 10 Resistance and Tolerance

A. Write the correct resistance and tolerance of the color bond resistors. Resistor Color Bond 1 Yellow-White-Blue-Silver 2 Green-Red-Red-No color 3 Blue-Green-Brown-Gold 4 Violet-Black-Orange-Silver 5 Gray-Black-Red-No color 6 White-Black-Blue-Gold 7 Red-Black-Brown-Silver 8 Orange-Yellow-Green-No color Blue-Violet-Gray-Gold White-Black-Gold-Silver 9 10 Resistance and Tolerance

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 63P: Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire...

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Copper has a work function of 4.70 eV, a resistivity of 1.7 x10-8 Ω ∙ m, and a temperature coefficient of 3.9 x10 -3 °C -1. Suppose you have a cylindrical wire of length 1.5 m and diameter 0.40 cm connected to a variable power source.a) Draw a clear physics diagram b) At what temperature would the wire have 2 times the resistance that it has at 20 °C?c) What is the peak wavelength of radiation emitted by a wire of thistemperature?d) If light at only the wavelength found above were shone onto a copper plate, what would be the maximum kinetic energy of the ejected electrons?
a)(i) What is the accuracy of a measurement of 26.5gm taken as against 25gm? (ii) State the types of resistor colour band in use and hence determine the colours of the following resistors: (i) K39±10%; (ii) M56±1%; (iii) 3K9±10%; (iv)120K±2% (v) 8R8±10%
The power rating of a resistor is the maximum power it can safely dissipate without being damaged by overheating. If the power rating of a certain 17 kΩ resistor is 5.0 W, what is the maximum current it can carry without damage?What is the greatest allowable potential difference across the terminals of the resistor?
What is the maximum value in the tolerance range of a resistor with color code red-violet-orange-gold? Select one: a. 27 kΩ b. 32.4 kΩ c. 28.35 kΩ d. 29.7 kΩ
A photoresistor, whose resistance decreases with light intensity, is connected in the circuit as shown. On a sunny day, the photoresistor has a resistance of 0.56 kΩ. On a cloudy day, the resistance rises to 4.0 kΩ. At night, the resistance is 20 kΩ.a. What does the voltmeter read for each of these conditions?b. Does the voltmeter reading increase or decrease as the light intensity increases?
Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire ofcopper to transmit power at a current of I = 100.00 A.How much more power is dissipated in the copper wires than it would be in superconducting wires?
Check Your Understanding Copper wires use routinely used for extension cords and house wiring for several reasons. Copper has the highest electrical conductivity rating, and therefore the lowest resistivity rating, of all nonprecious metals. Also important is the tensile strength, where the tensile strength is a measure of the force required to pull an object to the point where it breaks. The tensile strength of a material is the maximumamount of tensile stress it can take before breaking. Copper has a high tensile strength, 2108Nm2 A thirdimportant characteristic is ductility. Ductility is a measure of a material’s ability to be drawn into wires and a measure of the flexibility of the material, and copper has a high ductility. Summarizing, for a conductor to be a suitable candidate for making wire, there are at least three important characteristics: low resistivity, high tensile strength, and high ductility. What other materials are used for wiring and what are the advantages and disadvantages?
Unreasonable Results (a) What current is needed to transmit 1.00 102 MW of power at 10.0kV? (b) Find the resistance of 1.00 km of wire that would cause a 0.0100% power loss. (c) What is the diameter of a 1.00-km-long copper wire having this resistance? (d) What is unreasonable about these results? (e) Which assumptions are unreasonable, or which premises are inconsistent?
What is the minimum value in the tolerance range of a resistor with color code brown-red-brown?
Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor can safely dissipate without too great a rise in temperature and hence damage to the resistor. (a) If the power rating of a 15 k Ω resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0 kΩ resistor is to be connected across a 120 V potential difference. What power rating is required? (c) A 100.0 Ω and a 150.0 Ω resistor, both rated at 2.00 W, are connected in series across a variable potential difference. What is the greatest this potential difference can be without overheating either resistor, and what is the rate of heat generated in each resistor under these conditions?
What is the maximum value in the tolerance range of a resistor with color code blue-gray-green-silver?
A copper wire has a diameter of 2.0 mm and a length of 3.0 m. It carries acurrent of 6.3 A. The density of free electrons in copper is 8.5×1028electrons per cubic meter and resistivity of copper is 1.7×10-8Ω.m.d )What is the drift velocity of free electrons? Or calculatethe drift velocity of free electrons (or find the drift velocity of freeelectrons)e) Find the power dissipated as heat in the wire