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# Resistors and Ohm's Law Solutions Library

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43 solutions

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. 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 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