Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 13, Problem 22CQ
Which will normally have the larger resistance, a voltmeter or an ammeter? Explain.
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Physics of Everyday Phenomena
Ch. 13 - Two arrangements of a battery, bulb, and wire are...Ch. 13 - Suppose you have two wires, a battery, and a bulb....Ch. 13 - In a simple battery-and-bulb circuit, is the...Ch. 13 - Are electric current and electric charge the same...Ch. 13 - When an axon is stimulated, a voltage spike or...Ch. 13 - Does the signal in an axon travel at the same...Ch. 13 - Consider the circuit shown, where the wires are...Ch. 13 - Consider the circuit shown. Could we increase the...Ch. 13 - Two circuit diagrams are shown. Which one, if...Ch. 13 - Suppose we use an uncoated metal clamp to hold the...
Ch. 13 - Consider the two signs shown, which are located in...Ch. 13 - If we decrease the potential difference across a...Ch. 13 - Prob. 13CQCh. 13 - When a battery is being used in a circuit, will...Ch. 13 - Two resistors are connected in series with a...Ch. 13 - In the circuit shown below. R1, R2,. and R3 are...Ch. 13 - In the circuit shown in question 16, which of the...Ch. 13 - If we disconnect R2, from the rest of the circuit...Ch. 13 - When current passes through a series combination...Ch. 13 - In the circuit shown, the circle with a V in it...Ch. 13 - In the circuit shown, the circle with an A in it...Ch. 13 - Which will normally have the larger resistance, a...Ch. 13 - Is electric energy the same as electric power?...Ch. 13 - If the current through a certain resistance is...Ch. 13 - Prob. 25CQCh. 13 - What energy source increases the potential energy...Ch. 13 - Prob. 27CQCh. 13 - Prob. 28CQCh. 13 - Prob. 29CQCh. 13 - Prob. 30CQCh. 13 - Prob. 31CQCh. 13 - Prob. 32CQCh. 13 - Why does a bimetallic strip bend when the...Ch. 13 - A charge of 28 C passes at a steady rate through a...Ch. 13 - A current of 4.5 A flows through a battery for 3...Ch. 13 - Prob. 3ECh. 13 - A current of 1.5 A is flowing through a resistance...Ch. 13 - A current of 0.522 A flows through a resistor with...Ch. 13 - Four 22 resistors are connected in series to an...Ch. 13 - A 47 resistor and a 28 resistor are connected in...Ch. 13 - In the circuit shown, the 1 resistance is the...Ch. 13 - Three resistors are connected to a 12-V battery as...Ch. 13 - Two resistors, each having a resistance of 40 ....Ch. 13 - Prob. 11ECh. 13 - Three identical resistances, each 30 , are...Ch. 13 - A 9-V battery in a simple circuit produces a...Ch. 13 - A 80 resistor has a voltage difference of 12 V...Ch. 13 - A 75-W light bulb operates on an effective ac...Ch. 13 - A toaster draws a current of 9.0 A when it is...Ch. 13 - A clothes dryer uses 6600 W of power when...Ch. 13 - In the circuit shown, the internal resistance of...Ch. 13 - Three 36 lightbulbs are connected in parallel to...Ch. 13 - In the circuit shown, the 8-V battery is opposing...Ch. 13 - In the combination of 12 resistors shown in the...Ch. 13 - A 850-W toaster, a 1200-W waffle iron, and a...
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- When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.arrow_forwardIf aluminum and copper wires of the same length have the same resistance, which has the larger diameter? Why?arrow_forwardWhen resistors with different resistances are connected in series, which of the following must be the same for each resistor? Choose all correct answers, (a) potential difference (b) current (c) power delivered (d) charge entering each resistor in a given lime interval (e) none of those answersarrow_forward
- In Figure P21.47, show how to add just enough ammeters to measure every different current. Show how to add just enough voltmeters to measure the potential difference across each resistor and across each battery.arrow_forwardUsing an ohmmeter, a student measures the resistance between various points on his body. He finds that the resistance between two points on the same finger is about the same as the resistance between two points on opposite hands-both are several hundred thousand ohms. Furthermore, the resistance decreases when more skin is brought into contact with the probes of the ohmmeter. Finally, there is a dramatic drop in resistance (to a few thousand ohms) when the skin is wet. Explain these observations and their implications regarding skin and internal resistance of the human body.arrow_forwardA wire with a resistance of 5.0 is drawn out through a die so that its new Length is twice times its original length. Find the resistance of the longer wire. You may assume that the resistivity and density of the material are unchanged.arrow_forward
- Why is it possible for a bird to sit on a high-voltage wire without being electrocuted?arrow_forwardA battery-operated car uses a 12.0-V system. Find the charge the batteries must be able to move in order to accelerate the 750 kg car from rest to 25.0 m/s, make it climb a 2.00102 -in high hill, and finally cause it to travel at a constant 25.0 m/s while climbing with 5.00102 -N force for an hour.arrow_forwardWhy isn't a bird sitting on a high-voltage power line electrocuted? Contrast this with the situation in which a large bird hits two wires simultaneously with its wings.arrow_forward
- Construct Your Own Problem Consider a person working in an environment where electric currents might pass through her body. Construct a problem in which you calculate the resistance of insulation needed to protect the person from harm. Among the things to be considered are the voltage to which the person might be exposed, likely body resistance (dry, wet, ...), and acceptable currents (safe but sensed, safe and unfelt, ...).arrow_forwardConsider the circuit below. The battery has an emf of = 30.00 V and an internal resistance of r = 1,00 . (a) Find the equivalent resistance of the circuit and the current out of the battery. (b) Find the current through each resistor, (c) Find die potential drop across each resistor, (d) Find the power dissipated by each resistor, (e) Find the total power supplied by the batteries.arrow_forwardFind the resistance that must be placed in parallel with a 60.0- galvanometer having a 1.00-mA sensitivity (the same as die one discussed in the text) to allow it to be used as an ammeter with a 25.0-A full-scale reading. Include a circuit diagram with your solution.arrow_forward
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