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# Resistors and Ohm's Law Solutions Library

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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