A cylindrical wire has a resistance R and resistivity o as in figure (a). If its length L and diameter D are doubled as in figure (b), then its resistivity will now be:

Q: Let's say you have a 20 cm long silicon wire, with a diameter of 4 cm. What current flows through…

A: Write the given values with suitable variables. L=20 cm=0.2 mr=4 cm2=0.02 mV=1000 Vρ=2300 Ω.m Here,…

Q: During an experiment to verify Ohm's law, the voltage and resistance of a circuit are measured.…

A:

Q: Compute the voltage drop along a 22-mm length of the household no. 14 copper wire (used in 15-A…

A: R=ρLπd2/4=4ρLπd2=41.68×10-8Ω⋅m22 mm10-3 m1 mmπ1.628 mm10-3 m1 mm2=1.78×10-4 ohm

Q: Calculate the ratio of the resistance of 15.0 m of aluminum wire 2.3 mm in diameter, to 30.0 m of…

A: Given: Length of aluminum wire, La=15 m            Diameter of aluminum wire, d=2.3 mm…

Q: Q2: Design series ohmmeter using PMMC of 100Ω internal resistance and 0.4ma full-scale deflection…

A: For half-scale deflection Rx=R1 . Let Rx be the resistance to be measured R1 be the standard…

Q: A wire of length ℓ and of cross section A has a resistance R. What is the resistance obtained if one…

A: Given,

Q: Compute the voltage drop along a 33 m length of household no. 14 copper wire (used in 15-A…

A:

Q: 1 0.500-meter length of wire with a cross-sectional area of 3.14 x 106 meters squared is found to…

A: Given value--- length = 0.5 m. Area = 3.14 × 10-6 m2 . Resistance = 2.53 × 10-3 ohm. We have to…

Q: Two different wires, of the same cross-sectional area, are connected in a series as part of a…

A:

Q: A conductor of cross-sectional area A length and resistivity o has resistance R. What is the new…

A:

Q: R1 R1 Repeating to infinity R2 R2. R1 R

A: We have an infinite circuit of resistances with R1=10 ohms and R2=12 ohms. Let the combinations of…

Q: In Figure (a) below, a 11.34 V battery is connected to a resistive strip that consists of three…

A: As per the diagram given,the applied voltage, i.e battery voltage is 11.34 V. The battery is…

Q: A Leclanche cell with thc e.m.f. 1.45 V and internal resistance 2 N is connected to a potentiometer…

A: To find-(1) Potential gradient (2) Balancing lengthGiven-E=1.45 Vr=2 ohmL=4 mR=8 ohmR'=1440 ohmE.m.f…

Q: NOTE: Solve this as soon as possible, I need this urgently. Registration number = 24 Q 03: Suppose…

A: Given The value of resistance R1 is R1=100 Ω. The value of resistance R2 is R2=120 Ω. The…

Q: Ex. 60: A potentiometer wire of length 10 m and resistance 9N is connected to a battery of e.m.f.…

A: To find-(1) Potential gradient along the wire VL=?(2) Balancing length for cell of emf 1.08…

Q: and R2 are connected in parallel, as in the figure below, then the total resistance R, measured in…

A: Write the expression for equivalent resistance.

Q: What is the diameter of a 1.00-m length of tungsten wire resistance is 0.38 Ω?

A: Given : Length of the tungsten wire is 1.00 m Resistance of the wire is 0.38  Ω

Q: Four resistors and a power supply are placed in a circuit as shown in the attached image. (a) What…

A:

Q: Q1\Compute the resistance of the given material whose resistivity is 3.333 m; area of cross-section…

A: A material of Resistivity = 3.333 Area of cross-section = 25 cm2 Length = 15 cmResistance =?

Q: How much energy is stored in a capacitor of capacitance C = 2.89 µF connected in series to a…

A: The voltage across the capacitor at the given instant is given by, V=ε1-e-tτ=ε1-e-2.12ττ=3.55…

Q: (a) ideal ammeter (Give your answer in mA.) mA (b) ideal voltmeter (Give your answer in volts.) (c)…

A: We know that  we have a circuit is given as  a) By the KVL we get that  -∆V+10I+RI=0 -5.40+10I+9.40…

Q: A piece of 12-gauge copper wire has a length of 22.25 m.  Using the included image as reference,…

A: The objective of this question is to calculate the resistance of a 12-gauge copper wire of length…

Q: Potential difference (V) vs. current (A) 00 00 y = 0.0667x 00 00 00 00 00 00 0.2 0.4 0.6 0.8 1

A: according to ohm's law V=IR

Q: Two different wires, of the same cross-sectional area, are connected in series as part of a circuit.…

A: Required : Part (a)  If the electric field in wire 1 is E1, and the electric field through wire 2 is…

Q: The resistivity of this material is 1.52 ohms. What is the resistance?

A:

Q: A cylindrical rod of semiconducting material with length L and cross-sectional area A is doped so…

A: A cylindrical rod of semiconducting material with length L and cross-sectional area A is doped so…

Q: What is the approximate input resistance of a centre-fed folded dipole of length L = N3? %3D

A: Given, Centre-fed folded dipole of length L=λ3

Q: Ex. 60: A potentiometer wire of length 10 m and resistance 9 Q is connected to a battery of e.m.f.…

A: To find- (1)Potential gradient a long the wire VL=?(2)Balancing length for cell of e.m.f 1.08…

Q: na closed сп it, an electh current of intensity i goes thro esistance R. The electric potential at…

A: (a)In a closed circuit, an electric current of intensity (i) goes through a resistor of resistance…

Q: The resistivity “ρ” of a wire is expressed as ρ(x)=αx where α is a constant and x is thelength of…

A:

Q: Figure 3.34 shows a potentiometer circuit for comparison of two resistances. The balance point with…

A: Given Data:Resistance of the standard resistor, R=10.0 ohmBalance point for the resistance, l1=58.3…

Q: A cylindrical, non-ohmic, uniform conductor is placed in a uniform electric field that points from…

A: J= sigma (E)

Q: A potential difference of 9 V is maintained across a conductor in a circuit. If the conductor has a…

A: Potential difference of the battery, V = 9 V resistance of the conductor, R = 10 ohms time, t = 5…

Q: If two resistors with resistances R, and R, are connected in parallel, as in the figure below, then…

A:

Q: a resistor of R ohms is connected across a battery of E volts with internal resistance r ohms, then…

A: Given, Expression of the power across the external resistor R is given as, P = E2R(R+r)2

Q: Consider the circuit shown below. Find V, (in V), I, (in A), and I, (in A). (Due to the nature of…

A: We will be using Kirchoff's laws to solve this problem. Kirchhoff's laws are: Law of Junctions: Sum…

Q: A cylindrical conductor with resistivity ρ, length L, and radius r , has resistance R0=302Ω. If the…

A:

Q: Calculate the current in the resistor R4, given that R = 42 ohm and battery EMF = 9. (Ignore…

A:

Q: 7. The circuit below has been in position a for a long time. At time t = 0 the switch is shown to…

A: When capacitor is connected to the battery for a long time then it doesn't allow current to pass…

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.