# electrical resistance and conductance

Resistivity is the measure of how strongly a material opposes the flow of electric current. The temperature coefficient of resistivity of platinum is 3.9 x 10^-3 /C. This light bulb behaves like a resistor. The Electrical Conductance is the measure of property of a material by which it allows the electrons or electricity to pass through it. a) Calculate the resistance... A two-phase metal alloy is known to be composed of α and β phases that have mass fractions of 0.64 and 0.36, respectively.

Conductance is an expression of the ease with which electric current flows through a material. In order to know the value of a resistor without measuring it, there is a resistor color code that helps us to easily obtain its resistance. According to Ohm’s law V=IR from which resistance can be calculated as, Conductance can be calculated from conductivity. Gold is the most ductile of all metals. The potential difference across the filament of a light bulb is kept constant while the filament heats up to its final equilibrium temperature. Explain why. Two wires of an equal diameter are connected in series to make the resistance of the combination temperature independent. All rights reserved. What is the effective resistance of a cars starter motor when 140 A flows through it as the car's battery applies 11.0 V to the motor? (Show how you arrived at your result and include units). If the temperature coefficients of resistance are \alpha_1 and \alpha_2 wit... A tungsten wire has a radius of 0.087 mm and is heated from 20.0 to 1485 degree C. The temperature coefficient of resistivity is \mu = 4.5 \times 10^{-3} (C degree)^{-1}. A length of this wire is to be used as a resistor that will develop 140 W of power when conn... What are the maximum voltage and current which should occur: a. for a (1/4) watt, 300-ohms resistor?

Show that the charge flew through the coil after the short-circuiting i... As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with uniform cross-section. The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 \times 10^{-8} \ m). It has length L, radius of the cross section r, and resistivity rho. And they are represented with a unit of ohms – cmil/ft. Electric conductivity may be represented by the Greek letter σ (sigma), κ (kappa), or γ (gamma).

b.

Conductivity is a measure of how well a material conducts an electric current. It is represented by symbol ρ. Th... What is the resistance of a 13 cm long piece of iron with a 1.5 mm \times 1.5 mm square cross-section? NCERT Solutions of class 9 Maths exercise 7.1 of chapter 7- Triangles, NCERT Solutions class 9 Maths exercise 6.3 of chapter 6-Lines and Angles, NCERT solutions class 9 maths exercise 6.2 of chapter 6- Lines and Angles, NCERT Solutions class 9 maths exercise 6.1 of chapter 6-Lines and Angles, NCERT Solutions of class 9 Maths exercise 5.1 of chapter 5-Introduction to Euclid’s Geometry, NCERT Solutions of class 9 maths exercise 4.3 of chapter 4- Linear equations in two variables, Solutions of half yearly maths question paper of class 10 CBSE 2020, NCERT Solutions of Class 9 maths exercise 7.3 of chapter 7- Triangles, NCERT Solutions Class 9 Maths exercise 7.2 of the chapter 7-Triangles. Find the Power dissipated in the 12-k\Omega resistor. a. Therefore in the series combination, reciprocal of total conductance is the addition of reciprocal of the entire individual conductance. The loop ABCD is moving with velocity V towards right. A wire of length 1 m and radius 0.1 mm has a resistance of 100 Ohm. Resistance is directly dependent on the length and inversely proportional to the area but resistivity is directly dependent on the cross-sectional area and inversely proportional to the length of the material. A material is formed into a long rod with a square cross-section 3.3 mm on each side.