Q. 2. The given figure shows the Wheatstone bridge method for measurement of unknown resistance R. The balanced equation for Wheatstone bridge is given by : U (a) (c) P Q R S = PS || R Q R S (b) (d) P S = P a|Ras RO = S
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- What is the resistance of a 3.4-m length of copper wire 1.8 mm in diameter? The resistivity of copper is 1.68 × 10¬8N.m. Express your answer to two significant figures and include the appropriate units. HA ? R = Value UnitsCalculate the ratio of the resistance of 14.0 m of aluminum wire 2.4 mm in diameter, to 21.0 m of copper wire 1.6 mm in diameter. Express your answer using two significant figures. Hνα ΑΣφ Y 8 € n 0 α V n P o t x ΔΣΦΨΩ h RAI Ro = 0.45In the figure resistor 1 = 126 2, resistor 2 = 81 N, and the ideal batteries have emfs ɛ1 E2 = 5 volts, and ɛ3 = 7 volts. Find the current through resistor 1. = 29 volts, Round off answer up to 3 decimal places. Consider absolute value. Include the unit (A for ampere, V for volt and ohm for ohm). Rz RI ww
- What is the resistance of Part A A 1.1-m-long gold wire that is 0.50 mm in diameter? Express your answer in ohms. ινα ΑΣφ ? R = Ω Submit Request Answer Part B A 80-cm-long piece of carbon with a 1.0 mm x 1.0 mm square cross section? Express your answer in ohms. ? R = Ω Submit Request AnswerA platinum resistance thermometer (PRT) is a transducer which measures temperature 0 by means of consequent change of electrical resistance RT between its two terminals. Such a PRT has the following quadratic characteristic: RT=Ro [1+A0+BO^2] The PRT is calibrated so that its resistance is Ro = 100 Q at a reference temperature of 0 = 0°C. The coefficients have the following values: A = +4.0 x 10-3 °C-1 B = -5.0 x 10-6 oc-2 Determine sensitivity of this transducer at temperatures of +50 °C. Select one: O a. 0.45 Q/°C Ob. -0.45 Q/°C -0.35 Ω/ΟC d. 0.4 0/°C O e. 0.35 Q/°C O f. -0.4 0/PCSuppose you wish to fabricate a uniform wire from 2.50 g of copper. The wire is to have a resistance of R = 0.660 N and all the copper is to be used. (a) What must be the length of this wire? 3.27 (b) What must be the diameter of this wire? 6.74 Can you calculate the total volume of 2.50 grams of copper? um
- A copper wire has a resistance of 15 Ω at some temperature. An aluminum wire has 3 times the length and 5 times the radius of the copper wire. The resistivity of copper is 0.7 times that of aluminum. What is the resistance, in Ω, of the aluminum wire at the same temperature? Round your answer to 0 decimal places.What is the resistance of Part A A 1.3-m-long gold wire that is 0.30 mm in diameter? Express your answer in ohms. R = ΠΑΣΦ xa Xh Of h √x Vx X <४ IXI X.10n ? a ReviewWith eh following values, what is the current through R1, in A? Use positive for to the right, and negative for to the left. V1 = 10.9 V V2 = 16.1 V R1 = 26 Ω R2 = 77 Ω
- Find the ratio of the resistances of a copper wire to an aluminum wire if the length and diameter of the aluminum wire is twice the diameter of the copper. Given: L1 = 100 cm R1 = 25 Ω(a) What is the terminal voltage (in V) of a large 1.90 V carbon-zinc dry cell used in a physics lab to supply 1.20 A to a circuit, if the cell's internal resistance is 0.200 Q? V (b) How much electrical power (in W) does the cell produce? W (c) What power (in W) goes to its load? W2. Page > of 3 5. Two long coaxial metal cylinders with radii a and b are separated by material of conductivity o (see figure below). The conductivity is not uniform and changes as = (s)0 where k is a constant. If the two cylinders are kept at a potential difference V, find the resistance R between the cylinders. (s)o Hint: Since the conductivity is a function of position, the charge density in the resistive medium is not zero and E does not go like 1/s. However, since the current I is steady, the same current flows across each eylindrical surface. Instead of using Gauss' Law, find E in terms of I, from Ohm's Law. acer F10 F11