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Resistors and Ohm's Law Solutions Library

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15 solutions

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