If a rectangular solid made of carbon has sides of lengths a,2a, and 3a, to which faces would you connect the wiresfrom a battery so as to obtain (a) the least resistance, (b) thegreatest resistance?

Q: Consider two resistors, R₁ and R₂, connected in parallel. Derive the expression that gives the total…

A:

Q: A cell balances against a length of 200 cm on a potentiometer wire, when it is shunted by a…

A: We need to compute-Balancing length (L)=?Internal resistance (r)=?The data given as-L1=200 cmR1=8…

Q: (!) THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN HERE. A rod of semiconducting…

A:

Q: Suppose you wish to fabricate a uniform wire out of 1.25 g of copper. If the wire is to have a…

A: Given: M=1.25 Density(D)=8940 Kg/m3 Resistivityρ=0.0171 Ωm To find: (a)Length of the uniform copper…

Q: (b) Suppose node f in Figure 2 is connected to ground, and the elements in the circuit have the…

A:

Q: A melliammelee has a resistance of 5 ohm & can read a maximum of 20 m & How will you use it as…

A: To find- A high resistance (R) is to be used in series with the milliammeter so that the current…

Q: If the resistor is made of carbon, what will its resistance be when its temperature is increased by…

A:

Q: A wooden skewer and a piece of wire have the same dimensions: a length of 0.20 m and a…

A:

Q: The temperature coefficient of a certain conducting material is 4.78 × 10-3 (°C)-1. (a) At what…

A:

Q: (I) Three 45Ω lightbulbs and three 65Ω lightbulbs areconnected in series. (a) What is the total…

A: Three 45Ω light bulbs and three 65Ω light bulbs are connected in series

Q: The capacity of a storage battery, such as those used in automobile electrical systems, is rated in…

A: When a potential difference is present across a conductor, and a current passes through it, the…

Q: When you double the voltage across a certain material ordevice, you observe that the current…

A: According to Ohm's law, the current should vary with the voltage linearly. because, V= IR So by…

Q: The resistance R of a copper wire at temperature T = 25 °C is R = 112. Estimate the resistance at T…

A: The resistance R of a copper wire with a temperature T in C  is R(T).Then, given that R(25)=11 and…

Q: An ideal voltmeter V is connectedto a 2.0 Ω resistor and a battery withemf 5.0 V and internal…

A: Given: An ideal voltmeter V is connected to a 2.0 Ω resistor and a battery with emf 5.0 V and…

Q: A certain car battery with a 12.0 V emf has an initial charge of 120 Ah. Assuming that the potential…

A: Given that-Potential difference, V= 12 VoltInitial Charge= 120AhPower, P= 100 Watt't' is the time.We…

Q: What is the resistance of a 0.60-mm-long axon?

A: While the length substituted is correct, the area of the cross section is wrong. You only calculated…

Q: (3). A thin wire of length L, and cross sectional area 4 oriented in the x- direction is made of…

A: Given the resistivity of wire varies as, ρ=ρ∘e-xL Here, L is the length of the wire. According to…

Q: (a) During surgery, a current as small as 20.0 µA applied directly to the heart may cause…

A: OHM'S LAW is used to calculate voltage by using below formula  V=IR GIVEN: I=20μAR=300Ω Plug value…

Q: (a) What will happen to the material’s resistivity if the resistance is increased?  (b) What will…

A: Concept Resistivity is dependent only on the composition of the material and the temperature.

Q: By ignoring the internal resistance of the battery. Determine the unknown curreny( I), Resistance…

A: For the given circuit diagram,

Q: A rod of semiconducting material of length L = 10 m and cross-sectional area A = 4.5 mm² lies along…

A: Write a given values of this question. L=10mA=4.5mm2=4.5×10-6m2ρ∘=5×10-4Ω.mV∘=30V

Q: The average bulk resistivity of the human body (apartfrom surface resistance of the skin) is about…

A: Part (a) Given: The resistivity of human body is ρ=5 Ω·m. The length of cylinder is L=1.6 m. The…

Q: (b) For the circuit shown in Figure Q1 (b), use mesh analysis to find currents i, iz and is 10 V 4Ω…

A: Please see the answer below

Q: Two diametrically opposite points of a metal ring are connected to two terminals of the left gap of…

A: To find-Resistance of wire bent in shape of ring (x)=?Given-Resistance in right gap (R)=15…

Q: A Nichrome heating element in an oven has a resistanceof 8.0 Ω at 20.0°C. (a) What is its resistance…

A:

Q: If we stretch a copper rod, making it 0.1% longer, a) How much would its resistance vary? b) What…

A: Given percentage change in length of wire is 0.1% longer. We know the resistance of a wire of…

Q: For some an application, it is important that the value of a resistance nof change with temperature.…

A: The resistivity of carbon resistor, : 3~60*10^-5The resistivity of Nichrome resistor, :…

Q: (1) Current density describes how charges flow through an extended object such as a wire. (II)…

A: Current density is the amount of charge flowing per unit time through unit cross sectional area  of…

Q: (a) When measuring the voltage across a resistor and the current through it, the voltmeter and the…

A: Remember:Ideal meters are theoretical concepts, and real meters have some internal resistance and…

Q: (c) Find the resistance per unit length of a gold wire with radius of 0.025 m. Given the…

A:

Q: (a) You need a 45 resistor, but the stockroom has only 20 and 50 resistors. How can the desired…

A: According to question we need to choose correct option.