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79 solutions

Resistors and Ohm's Law

Q. The resistance of the ideal wires in our problem isa. Equal to the power dissipated by the wireb. Zeroc. Directly proportional to the current in th...

Solved • Mar 30, 2021

Resistors and Ohm's Law

Q. The equation l = Δ V / R is calleda. Faraday’s lawb. Ampere’s lawc. Weber’s lawd. Ohm’s law

Solved • Mar 30, 2021

Resistors and Ohm's Law

Q. When the switch S in the figure is closed, the reading of the voltmeter V willa. increase.b. decrease.c stay the same.

Solved • Feb 10, 2021

Resistors and Ohm's Law

Q. Consider two wires of the same diameter, one is aluminum with a resistivity of 2.65x10-8 Ωm and another is copper with resistivity of 1.72x10-8 Ωm....

Solved • Feb 8, 2021

Resistors and Ohm's Law

Q. The current I in the main branch of the circuit shown is 25 Amps. The current I1 through resistor R1 is 5 Amps, and the current I2 through resistor...

Solved • Feb 4, 2021

Resistors and Ohm's Law

Q. From lowest to highest, rank the current in the main branch of the circuit – that is – rank the current passing through point j. a. A, B, C b. A, C...

Solved • Feb 3, 2021

Resistors and Ohm's Law

Q. If you stretch a copper wire so that it becomes thinner and longer, the resistance between its ends becomes a. larger b. smaller c. The resistance ...

Solved • Feb 3, 2021

Resistors and Ohm's Law

Q. Heat a copper wire and its electric resistance a. Increases b. Decreases c. Remains the same

Solved • Feb 3, 2021

Resistors and Ohm's Law

Q. The voltage across a 10 ohm resistor carrying 5 Amps of current is a. 10 Volts b. 5 Volts c. 1 Volt d. 50 Volts

Solved • Feb 3, 2021

Resistors and Ohm's Law

Q. What is the resistance of a carbon rod at 25.8 degrees C if its resistance is 0.0160 ohms at 0.0 degrees C?

Solved • Feb 2, 2021

Resistors and Ohm's Law

Q. A battery is connected to a resistor. Based on the nature of the DC circuit or the equation in the previous question, increasing the resistance of ...

Solved • Jan 21, 2021

Resistors and Ohm's Law

Q. A uniform wire of resistance R is stretched unit its length doubles. Assuming its density and resistivity remain constant, what's its new resistance?

Solved • Jan 21, 2021

Resistors and Ohm's Law

Q. R=ρL/A,  where L is the length and A is the cross-sectional area of the wire. From the wire in question 4, the length of the wire is 10m, the cross...

Solved • Jan 15, 2021

Resistors and Ohm's Law

Q. A certain ammeter has a resistance of 2.5 x 10-3 Ω on a scale which reads up to 2.5 A, and contains a 12-Ω galvanometer. What is the sensitivity of...

Solved • Jan 8, 2021

Resistors and Ohm's Law

Q. A 9.0 V battery is connected to a bulb whose resistance is 1.6 Ω. How many electrons leave the battery per minute?

Solved • Dec 17, 2020

Resistors and Ohm's Law

Q. True or False: The resistances measured in this experiment are large. Typical values are more than 1000 Ω.

Solved • Dec 16, 2020

Resistors and Ohm's Law

Q. For each of the circuits shown in the accompanying figures determine the current through each resistor

Solved • Dec 2, 2020

Resistors and Ohm's Law

Q. For each of the resistances in the accompanying figures the current through the resistance is indicated. Determine the voltage across each resistor

Solved • Dec 2, 2020

Resistors and Ohm's Law

Q. Is there any utility to nichrome in spite of being a poor conductor?

Solved • Dec 1, 2020

Resistors and Ohm's Law

Q. a. What is the current through the 3.0 Ω resistor?b. What is the value of the current I?

Solved • Nov 3, 2020

Resistors and Ohm's Law

Q. true or false: most conducting materials have different resistances at different temperatures.

Solved • Nov 2, 2020

Resistors and Ohm's Law

Q. Which statement describes the relationship of voltage and current?

Solved • Nov 2, 2020

Resistors and Ohm's Law

Q. A copper transmission cable 100 km long and 10.0 cm in diameter carries a current of 125 A. (a) What is the potential drop across the cable? (b) Ho...

Solved • Nov 2, 2020

Resistors and Ohm's Law

Q. Which of the following copper conductor conditions has the least resistance?1. thin, short, and hot2. thin, long, and cool3. thick, short, and cool...

Solved • Oct 15, 2020

Resistors and Ohm's Law

Q. What potential difference is required to cause 4.00 A to flow through a resistance of 330 ohms?

Solved • Oct 13, 2020

Resistors and Ohm's Law

Q. 2. (1 pt) Sketch, in a plot like the one below, the voltage as one moves around the outer loop in the circuit from part A, from point C through V1 ...

Solved • Oct 12, 2020

Resistors and Ohm's Law

Q. If the resistance in a circuit connected to a constant current is halved, how is the voltage in the circuit affected?Select one:a. The voltage is r...

Solved • Jul 30, 2020

Resistors and Ohm's Law

Q.  If the voltage across a circuit of constant resistance is doubled, how is the current in the circuit affected?Select one:a. The current is doubled...

Solved • Jul 30, 2020

Resistors and Ohm's Law

Q. Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the tw...

Solved • Jul 30, 2020

Resistors and Ohm's Law

Q. Which of the following statements are true? More than one answer may be correct - select all correct answers.Select one or more:a. A material that ...

Solved • Jul 30, 2020

Resistors and Ohm's Law

Q. Which of the following will increase the resistance of a wire? (More than one answer may be correct - select all correct answers).Select one or mor...

Solved • Jul 30, 2020

Resistors and Ohm's Law

Q. In household wiring, copper wire 2.05 mm in diameter (12 gauge) is often used. Find the resistance of a 24.0 m length of this wire. Note the resist...

Solved • Jul 17, 2020

Resistors and Ohm's Law

Q. What happens to the resistance of most common metals as the temperature of the metal increases?Select one:a. The resistance increases as temperatur...

Solved • Jul 17, 2020

Resistors and Ohm's Law

Q. An ammeter is connected in series to a battery of voltage Vb and a resistor of unknown resistance Ru (Figure 1) . The ammeter reads a current Io. N...

Solved • Jul 17, 2020

Resistors and Ohm's Law

Q. R=ρL/A where L is the length and A is the cross-sectional area of the wire. From the wire in question 4, the length of the wire is 10m, the cross-s...

Solved • Jul 17, 2020

Resistors and Ohm's Law

Q. In the figure R1 = 2.75R, the ammeter resistance is zero, and the battery is ideal. What multiple of ε/R gives the current in the ammeter?

Solved • Jul 16, 2020

Resistors and Ohm's Law

Q. The motor in a toy car operates on 6.00 V, developing a 4.50 V back emf at normal speed. If it draws 3.00 A at normal speed, what current does it d...

Solved • Jul 15, 2020

Resistors and Ohm's Law

Q. Determine the magnitude of the current in the (a) 8.0-Ω and (b) 2.0-Ω resistors in the drawing.

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. Pencil "lead" is actually carbon. What is the resistance of the 0.760 mm-diameter, 7.00cm-long lead from a mechanical pencil?

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. A wire with resistance R is connected to the terminals of a 6.0 V battery. What is the potential difference ΔV between the ends of the wire and the...

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. Consider two wires, one aluminum with resistivity 2.65 × 10–8 Ω•m and one copper with  1.72 × 10–8 Ω•m. Find the ratio of the diameter of aluminum ...

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. A copper wire is stretched so that its length increases and its diameter decreases. As a result, A. The wire's resistance decreases, but its resist...

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. Resistor color codes:a) What is the resistance of a resistor with the band colors Green Blue Brown? b) What is the resistance of a resistor with th...

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest. The resistance of the path is 500 Ω and a 10.0-mA ...

Solved • Jul 14, 2020

Resistors and Ohm's Law

Q. A circuit calls for a 0.900mm -diameter copper wire to be stretched between two points. You don't have any copper wire, but you do have aluminum wi...

Solved • Jul 13, 2020

Resistors and Ohm's Law

Q. The figure is a current-versus-potential-difference graph for a cylinder. What is the cylinder's resistance?

Solved • Jun 2, 2020

Resistors and Ohm's Law

Q. The wires in (Figure 1) all have the same resistance; the length and radius of each wire are noted. Rank in order, from largest to smallest, the re...

Solved • Jun 2, 2020

Resistors and Ohm's Law

Q. For this diagram, include three extra circuit symbols:A. An ammeter measuring the current at point AB. A voltmeter measuring the voltage drop acros...

Solved • May 26, 2020

Resistors and Ohm's Law

Q. In household wiring, copper wire 2.05 mm in diameter (12 gauge) is often used. Find the resistance of a 24.0 m length of this wire. Note the resist...

Solved • May 21, 2020

Resistors and Ohm's Law

Q. Imagine a single-loop circuit with a battery, and three resistors R1, R2, R3 connected in series. Resistance is ignorable except for the resistors....

Solved • May 13, 2020

Resistors and Ohm's Law

Q. What is the equivalent resistance between points a and b in the figure?

Solved • May 13, 2020

Resistors and Ohm's Law

Q. Suppose that ℰ = 65 V. (Figure 1)What is the potential difference across the 40 Ω resistor? Express your answer with the appropriate units.What is ...

Solved • Apr 30, 2020

Resistors and Ohm's Law

Q. What is the purpose of the rheostat in the resistance and resistivity experiment?1) to limit the current in the circuit.2) to overheat.3) as an aid...

Solved • Apr 29, 2020

Resistors and Ohm's Law

Q. The diameter of a specific copper wire is 8.325 mm, and has a resistivity of 1.72 x 10-8Ω-m. Find the resistance of a 0.85 km length of such wire u...

Solved • Apr 28, 2020

Resistors and Ohm's Law

Q. a) Explain the distinction between an ohmic and non-ohmic material, in terms of how the current and resistance behave as the voltage difference acr...

Solved • Apr 28, 2020

Resistors and Ohm's Law

Q. You have a circuit consisting of four 4.5 V D-cell batteries in series, some wires, and a light bulb. The bulb is lit and the current flowing throu...

Solved • Apr 27, 2020

Resistors and Ohm's Law

Q. The figure is a current-versus-potential-difference graph for a cylinder.What is the cylinder's resistance?

Solved • Apr 22, 2020

Resistors and Ohm's Law

Q. Pure silicon contains approximately 1.0 x 1016 free electrons per cubic meter.Resistivities at Room Temperature (20 °C)(a) Referring to the table a...

Solved • Apr 14, 2020

Resistors and Ohm's Law

Q. Two identical lightbulbs are connected in series to a single 9.0 V battery.a. Sketch the circuit.b. Sketch a graph showing the potential as a funct...

Solved • Apr 9, 2020

Resistors and Ohm's Law

Q. A 0.0075 v/m electric field creates a 3.9 mA current in a 1.0 mm diameter wire. What material is the wire made of?

Solved • Apr 8, 2020

Resistors and Ohm's Law

Q. A. Consider a circuit containing five identical light bulbs and an ideal battery. Assume that the resistance of each light bulb remains constant. R...

Solved • Apr 8, 2020

Resistors and Ohm's Law

Q. A wire of length L and cross-sectional area A has resistance R.What will be the resistance Rstretched of the wire if it is stretched to twice its o...

Solved • Apr 8, 2020

Resistors and Ohm's Law

Q. Which of the following will increase the resistance of a wire?Check all that apply.a) Decreasing the resistivity of the material the wire is compos...

Solved • Apr 8, 2020

Resistors and Ohm's Law

Q. Consider the circuit shown. (Intro 1 figure) All wires are considered ideal; that is, they have zero resistance. We will assume for now that all ot...

Solved • Apr 7, 2020

Resistors and Ohm's Law

Q. Electrons moving through the circuit in the attached figure will go through the resistorA. go from a to b.B. go from b to a.

Solved • Mar 24, 2020

Resistors and Ohm's Law

Q. What is the equivalent resistance between points a and b in the figure (Figure 1)? Express your answer using one significant figure.

Solved • Mar 11, 2020

Resistors and Ohm's Law

Q. According to Table 1, which of the following materials is the best electrical conductor? Brass Copper Aluminum Nichrome

Solved • Mar 11, 2020

Resistors and Ohm's Law

Q. Rank in order, from largest to smallest, the resistivities ρ1 to ρ5 of these wires. Rank from largest to smallest. To rank items as equivalent, ove...

Solved • Mar 11, 2020

Resistors and Ohm's Law

Q. Which of the following materials is the poorest electrical conductor?A. NichromeB. CopperC. Aluminum D. Brass 

Solved • Mar 11, 2020

Resistors and Ohm's Law

Q. Consider two conductors 1 and 2 made of the same ohmic material (ρ 1 = ρ2). Denote the length of the conductor by ℓ and the radius by r. The same v...

Solved • Jun 27, 2017

Resistors and Ohm's Law

Q. A long, uniform conducting wire with resistance R is connected to the terminals of a battery with emf V, dissipating a power P. If the cross-sectio...

Solved • Apr 28, 2017

Resistors and Ohm's Law

Q. What is the resistance of a Nichrome wire at 0.0°C if its resistance is 100.00 Ω at 45°C? The temperature coefficient for nichrome is 4.00x10-4 (°C...

Solved • Apr 18, 2017

Resistors and Ohm's Law

Q. Two pieces of metal are shaped into resistors and are connected end-to-end. The first resistor, R1, has twice the length of the second resistor, R ...

Solved • Mar 1, 2017

Resistors and Ohm's Law

Q. The resistivity of a 1.0 m long wire is 1.72 x 10 -8 Ωm and its cross-sectional area is 2.0 x 10-6 m2. If the wire carries a current of 0.2 A, what...

Solved • Feb 21, 2017

Resistors and Ohm's Law

Q. The headlight of a car has a resistance R = 3.4Ω. The headlight consists of a tungsten wire (resistivity p = 5.6 x 10-8 Ω • m) of length 12.4 cm. W...

Solved • Jan 13, 2017

Resistors and Ohm's Law

Q. If a cylindrical metal wire is stretched to 4 times of its original length, what is the resulting resistance R, compared with the original resistan...

Solved • Jan 9, 2017

Resistors and Ohm's Law

Q. You are given a copper bar of dimensions 3 cm x 5 cm x 8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the...

Solved • Jan 4, 2017

Resistors and Ohm's Law

Q. The current in a resistor decreases by 2.27 A when the voltage applied across the resistor decreases from 12.3 V to 4.26 V. Find the resistance of ...

Solved • Jan 3, 2017

Resistors and Ohm's Law

Q. The length of a certain wire is doubled and at the same time its radius is increased by a factor of 4. What is the change in the resistance of this...

Solved • Dec 22, 2016