University Physics Volume 2
18th Edition
ISBN: 9781938168161
Author: OpenStax
Publisher: OpenStax
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Chapter 10, Problem 60P
Find the current through a person and identify the likely effect on her if she touches a 120-V ac source: (a) if she is standing on a rubber mat and offers a total resistance of 300 k
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Find the current through a person and identify the likely effect on her if she touches a 120-V ac source: (a) if she is standing on a rubber mat and offers a total resistance of 300 kΩ ; (b) if she is standing barefoot on wet grass and has a resistance of only 4000 kΩ .
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Chapter 10 Solutions
University Physics Volume 2
Ch. 10 - Check Your Understanding If you place a wire...Ch. 10 - Check Your Understanding Some strings of miniature...Ch. 10 - Check Your Understanding Consider the same...Ch. 10 - Check Your Understanding How would you use a river...Ch. 10 - Check Your Understanding Consider the electrical...Ch. 10 - Check Your Understanding In considering the...Ch. 10 - Check Your Understanding When using Kirchhoff’s...Ch. 10 - Check Your Understanding Digital meters are able...Ch. 10 - What effect will the internal resistance of a...Ch. 10 - A battery with an internal resistance of r and an...
Ch. 10 - Show that the power dissipated by the load...Ch. 10 - A voltage occurs across an open switch. What is...Ch. 10 - The severity of a shock depends on die magnitude...Ch. 10 - Suppose you are doing a physics lab that asks you...Ch. 10 - Some light bulbs have three power settings (not...Ch. 10 - Can all of die currents going into the junction...Ch. 10 - Consider the circuit shown below. Does the...Ch. 10 - Do batteries in a circuit always supply power to a...Ch. 10 - What are the advantages and disadvantages of...Ch. 10 - Semi-truck or trucks use four large 12-V...Ch. 10 - What would happen if you placed a voltmeter in...Ch. 10 - What is die basic operation of an ohmmeter as it...Ch. 10 - Why should you not connect an ammeter directly...Ch. 10 - A battery, switch, capacitor, and lamp are...Ch. 10 - When making an ECG measurement, it is important to...Ch. 10 - Why isn’t a short circuit necessarily a shock...Ch. 10 - We are often advised to not flick electric...Ch. 10 - A car battery with a 12-V emf and an internal...Ch. 10 - The label on a battery-powered radio recommends...Ch. 10 - An automobile starter motor has an equivalent...Ch. 10 - (a) What is the internal resistance of a voltage...Ch. 10 - A person with body resistance between his hands of...Ch. 10 - A 12.0-V emf automobile battery has a terminal...Ch. 10 - (a) What is the resistance of a 1.00102 , a 2.50k...Ch. 10 - What are the largest and smallest resistances yon...Ch. 10 - An 1800-W toaster, a 1400-W speaker, and a 75-W...Ch. 10 - Your car’s 30.0-W headlight and 2.40-kW starter...Ch. 10 - (a) Given a 48.0-V battery and 24.0- and 96.0- ...Ch. 10 - Referring to the example combining series and...Ch. 10 - Referring to Figure 10.16, (a) Calculate P3and...Ch. 10 - Refer to Figure 10.17 and the discussion of lights...Ch. 10 - Show that if two resistors R1 and R2 are combined...Ch. 10 - Consider the circuit shown below. The terminal...Ch. 10 - Consider the circuit shown below, (a) Find the...Ch. 10 - Consider the circuits shown below, (a) What is the...Ch. 10 - Consider the circuit shown below. Find V1,I2, and...Ch. 10 - Consider the circuit shown below. Find V1, V2, and...Ch. 10 - Consider the circuit shown below. Find I1, I2,and...Ch. 10 - Consider the circuit shown below, (a)...Ch. 10 - Consider the circuit shown below. Write the three...Ch. 10 - Consider the circuit shown below. Write equations...Ch. 10 - Consider the circuit shown in the preceding...Ch. 10 - A child's electronic toy is supplied by three...Ch. 10 - Apply the junction rule to Junction b shown below....Ch. 10 - Apply the loop rule to Loop afedcba in die...Ch. 10 - Suppose you measure the terminal voltage of a...Ch. 10 - The timing device in an automobile's intermittent...Ch. 10 - A heart pacemaker fires 72 times a minute, each...Ch. 10 - The duration of a photographic flash is related to...Ch. 10 - A 2.00- and a 7.50F capacitor can be connected in...Ch. 10 - A 500 resistor, an uncharged 1.50F capacitor,and a...Ch. 10 - A heart defibrillator being used on a patient has...Ch. 10 - An ECG monitor must have an KC time constant...Ch. 10 - Using the exact exponential treatment, determine...Ch. 10 - If you wish to take a picture of a bullet...Ch. 10 - (a) How much power is dissipated in a short...Ch. 10 - What voltage is involved in a 1.44-kW short...Ch. 10 - Find the current through a person and identify the...Ch. 10 - While taking a bath, a person touches the metal...Ch. 10 - A man foolishly tries to fish a burning piece of...Ch. 10 - (a) During surgery, a current as small as 20.0A...Ch. 10 - (a) What is the resistance of a 220-V ac short...Ch. 10 - A heart defibrillator passes 10.0 A through a...Ch. 10 - A short circuit in a 120-V appliance cord has...Ch. 10 - A circuit contains a D cell battery, a switch, a...Ch. 10 - A circuit contains a D-cell battery, a switch, a...Ch. 10 - Consider the circuit below. The battery has an emf...Ch. 10 - A homemade capacitor is constructed of 2 sheets of...Ch. 10 - A student makes a homemade resistor from a...Ch. 10 - The rather simple circuit shown below is known as...Ch. 10 - Three 300- resistors areconnect in series with...Ch. 10 - Consider a circuit that consists of a real battery...Ch. 10 - Consider the circuit shown below. What is the...Ch. 10 - Consider a circuit consisting of a battery with an...Ch. 10 - Consider the circuit shown below. The terminal...Ch. 10 - Consider the circuit shown below. (a) What is the...Ch. 10 - Consider the circuit shown below. (a)Determine the...Ch. 10 - Two resistors, one having a resistance of 145 ,...Ch. 10 - Two resistors, one having a resistance of 900k are...Ch. 10 - Apply the junction rule at point G shown below.Ch. 10 - Apply the loop rule to Loop akledcba in the...Ch. 10 - Find the currants flowing in the circuit in the...Ch. 10 - Consider the circuit shown below, (a) Find the...Ch. 10 - A flashing lamp in a Christmas earring is based on...Ch. 10 - A 160F capacitor charged to 450 V is...Ch. 10 - Some camera flashes use flash tubes that requite a...Ch. 10 - Consider the circuit shown below. Each battery has...Ch. 10 - Analog meters use a galvanometer, which...Ch. 10 - Analog meters use a galvanometer, which...Ch. 10 - Consider the circuit shown below. Find I1, V1, I2,...Ch. 10 - Consider the circuit below.(a) What is the RC time...Ch. 10 - Consider the circuit below, (a) What is the...Ch. 10 - Consider the infinitely long chain of resistors...Ch. 10 - Consider the circuit below. The capacitor has a...Ch. 10 - A 120-V immersion heater consists of a coil of...Ch. 10 - Find the resistance that must be placed in series...Ch. 10 - Find the resistance that must be placed in...
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- Find the current through a person and identify the likely effect on her if she touches a 120-V AC source: (a) if she is standing on a rubber mat and offers a total resistance of 300 k; (b) if she is standing barefoot on wet grass and has a resistance of only 4000 k .arrow_forwardThe 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.arrow_forwardThe values of the components in a simple series RC circuit containing a switch (Fig. P21.53) are C = 1.00 F, R = 2.00 106 , and = 10.0 V. At the instant 10.0 s after the switch is closed, calculate (a) the charge on the capacitor, (b) the current in the resistor, (c) the rate at which energy is being stored in the capacitor, and (d) the rate at which energy is being delivered by the battery.arrow_forward
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- A rechargeable battery has an emf of 13.2 V and an internal resistance of 0.850 . It is charged by a 14.7-V power supply for a time interval of 1.80 h. Alter charging, the battery returns to its original state as it delivers a constant current to a load resistor over 7.30 h. Find the efficiency of the battery as an energy storage device. (The efficiency here is defined as the energy delivered to the load during discharge divided by the energy delivered by the 14.7-V power supply during the charging process.)arrow_forwardRefer to Figure 10.17 and the discussion of lights dimming when a heavy appliance comes on. (a) Given the voltage source is 120 V, the wire resistance is 0.800 and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 15.0 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance, (b) What power is consumed by the motor?arrow_forwardWhen the current in the portion of the circuit shown in Figure P32.65 is 2.00 A anti increases at a rate of 0.500 A/s, the measured voltage is Vab = 9.00 V. When the current is 2.00 A and decreases at the rate of 0.500 A/s. the measured voltage is Vab = 5.00 V. Calculate the values of (a) I. and (b) Rarrow_forward
- Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as accurate as P=P0(1 + a?T) which gives the temperature variation of resistivity P.arrow_forwardThe timing device in an automobile's intermittent wiper system is based on an RC rime constant and utilizes a 0.500F capacitor and a variable resistor. Over whatrange must R be made to vary to achieve time constants from 2.00 to 15.0 s?arrow_forwardIntegrated Concepts (a) Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0-V batteries of a 750-kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 2.00 102-m- high hill in 2.00 min at a constant 25.0-m/s speed while exerting 5.00 102 N of force to overcome air resistance and friction? (c) To travel at a constant 25.0-m/s speed, exerting a 5.00 102 N force to overcome air resistance and friction? See Figure 20.44.arrow_forward
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