EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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(II) Calculate the ratio of the resistance of 10.0 m of aluminum wire 2.2 mm in diameter, to 24.0 m of copper wire 1.8 mm in diameter.
The circuit shown below can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.00 m and C is a sliding contact on this wire. A standard resistor R is included in the circuit. The position of C is adjusted until the voltmeter V reads zero.
(ii) The PRT consists of 9.00 m of wire of diameter 8.4 × 10-2 mm. The voltmeter reads 0 V when l1 = 0.422 m. If the standard resistor, R, has a resistance of 220 Ω, what is the resistivity of platinum? Show that you have checked that the value for the resistivity and its unit are sensible.
(1) A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0
min. Silver contains 5.0 x 1028 electrons per cubic meter. What is the current
in the wire? What is the magnitude of the drift velocity of the electrons in the
wire?
Chapter 25 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 25.2 - If 1 million electrons per second pass a point in...Ch. 25.2 - Prob. 1BECh. 25.3 - Return to the Chapter-Opening Question, page 651,...Ch. 25.4 - Prob. 1DECh. 25.4 - Prob. 1EECh. 25.4 - Prob. 1FECh. 25.4 - How many 60-W 120-V lightbulbs can operate on a...Ch. 25.6 - Each channel of a stereo receiver is capable of an...Ch. 25 - What quantity is measured by a battery rating...Ch. 25 - When an electric cell is connected to a circuit,...
Ch. 25 - When a flashlight is operated, what is being used...Ch. 25 - One terminal of a car battery is said to be...Ch. 25 - When you turn on a water faucet, the water usually...Ch. 25 - Can a copper wire and an aluminum wire of the same...Ch. 25 - The equation P = V2/R indicates that the power...Ch. 25 - What happens when a lightbulb burns out?Ch. 25 - If the resistance of a small immersion heater (to...Ch. 25 - Prob. 10QCh. 25 - Explain why lightbulbs almost always burn out just...Ch. 25 - Which draws more current, a 100-W lightbulb or a...Ch. 25 - Electric power is transferred over large distances...Ch. 25 - A 15-A fuse blows repeatedly. Why is it dangerous...Ch. 25 - When electric lights are operated on low-frequency...Ch. 25 - Driven by ac power, the same electrons pass back...Ch. 25 - The heating element in a toaster is made of...Ch. 25 - Is current used up in a resistor? Explain.Ch. 25 - Compare the drift velocities and electric currents...Ch. 25 - A voltage V is connected across a wire of length l...Ch. 25 - Why is it more dangerous to turn on an electric...Ch. 25 - Prob. 1PCh. 25 - Prob. 2PCh. 25 - Prob. 3PCh. 25 - Prob. 4PCh. 25 - Prob. 5PCh. 25 - Prob. 6PCh. 25 - Prob. 7PCh. 25 - Prob. 8PCh. 25 - Prob. 9PCh. 25 - Prob. 10PCh. 25 - Prob. 11PCh. 25 - Prob. 12PCh. 25 - Prob. 13PCh. 25 - Prob. 14PCh. 25 - Prob. 15PCh. 25 - (II) A rectangular solid made of carbon has sides...Ch. 25 - (III) A hollow cylindrical resistor with inner...Ch. 25 - Prob. 63GP
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- (II) A 100-W lightbulb has a resistance of about 12 Q when cold (20°C) and 140 N when on (hot). Estimate the tem- perature of the filament when hot assuming an average temperature coefficient of resistivity a = 0.0045 (C°)-1.arrow_forward(b) 1. A platinum resistance sensor has a resistance of 100 2 at 0 °C and a temperature coefficient of resistance (oc) of 4 x 10 "C. If the resistance of the sensor is 125 O, find the corresponding temperature of the sensor. ii. A variable dielectric capacitive displacement sensor consists of two square metal plates of side 5 cm, separated by a gap of 1 mm. A sheet of dielectric material 1 mm thick and of the same area as the plates can be slide between them as shown in Figure Q.4b. Given that the dielectric constant of air is 1 and that of the dielectric material is 4, calculate the capacitance of the sensor when the input displacement x-0.0 cm, 2.5 cm and 5,0 cm. Figure Q4barrow_forward(c) Find the resistance per unit length of a gold wire with radius of 0.025 m. Given the resistivity,p of gold is 2.44 x 10° 2.m.arrow_forward
- (a) Of what material is a wire made, if it is 20.0 m long with a 0.150 mm diameter and has a resistance of 18.0 N at 20.0°C? O lead copper O aluminum O silver (b) What is its resistance (in 2) at 130°C?arrow_forward(b) If the resistor is made of carbon, what will its resistance be when its temperature is increased by 68.0 C°? (The temperature coefficient of resistivity for carbon is −5.0 10-4 (°C)-1.) Amp=1.33arrow_forwardA conductor has a resistance of R. it was cut into twelve even pieces. Six of them are connected in series, six are connected in parallel. Then they are again connected in series. Find the total resistance. (10) 1arrow_forward
- 6. (a) Charge Q coulombs at time t seconds is given by the differential equation Õp dQ Q RE+ =0, where C is the capaci- dt tance in farads and R the resistance in ohms. Solve the equation for Q given that Q=Qo when t=0. (b) A circuit possesses a resistance of 250 × 10³ 2 and a capacitance of 8.5 x 10–6F, and after 0.32 seconds the charge falls to 8.0C. Determine the initial charge and the charge after 1 second, each correct to 3 significant figures. -tarrow_forward(II) Two aluminum wires have the same resistance. If one hastwice the length of the other, what is the ratio of the diameterof the longer wire to the diameter of the shorter wire?arrow_forward(a) To what temperature must you raise a copper wire, originally at 20 °C, to double its resistance, neglecting any changes in dimensions? Use a = 3.9×10 1 -3 O Yes No O T= (b) Does this happen in household wiring under ordinary circumstances?arrow_forward
- (i) A battery has an emf of 3.0 V and an internal resistance of 0.0200 Ω. What is the terminal voltage when the current drawn from the battery is 2.0 A? The terminal voltage is = (ii) If a current of 75 mA exists in a metal wire, how many electrons flow past a given cross section of the wire in 3 min? Number of electrons flow past a given cross section of the wire =arrow_forward(II) A certain copper wire has a resistance of At 15.0 Ωwhat point along its length must the wire be cut so that the resistance of one piece is 4.0 times the resistance of the other? What is the resistance of each piece?arrow_forward(III) A length of aluminum wire is connected to a precision10.00-V power supply, and a current of 0.4212 A is preciselymeasured at 23.5°C. The wire is placed in a new environmentof unknown temperature where the measured current is0.3818 A. What is the unknown temperature?arrow_forward
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