"What happens to the resistance of a piece of wire, if it is strtched to double its length?"     doubles     halves     quadruples     quarters     none of these

Q: What is the resistance of 600 ft. of no. 20 copper wire? Given : Area =1022 circular mils and…

A: we need to find out the value of R.

Q: A certain wire has a resistance of R. The resistance of another wire identical with the first except…

A: The obstruction offered to the smooth flow of current is called resistance. The electrical element…

Q: The resistance of a wire is 126.48 ohms at 100°C and 100 ohms at 30°C. Determine the temperature…

A: The resistance variation with the temperature is expressed as shown below:  R=R01+α∆t∆t=Change in…

Q: Round 12-gauge copper wire has a resistance of 1.6W / 1000ft. Calculate the power lost in the…

A: First we will find out resistance for given length then we will find out power and voltage .

Q: EXAMPLE 1 What is the resistance of a 100 ft length of copper wire with a diameter of 0.020 in. at…

A:

Q: Calculate the resistivity and conductivity of (10cm) length of a wire having a

A: The solution can be achieved as follows.

Q: A given wire has a resistance of 20 ohms. If its length is 300m, how much length must cut-off from…

A:

Q: 3. What is the resistance of a piece of material whose length is 2 cm, area is 4 cm² and resistivity…

A: Given a piece of material with, Length, l = 2 cm Area, A = 4 cm2 Resistivity, ρ=60×10-5 Ω-m

Q: What will be length (in m) of a 10 ohm wire, when the resistivity of the wire is 0.1 ohms-m and the…

A: Given, A wire having Resistance, R= 10 ohm Resistivity of the wire, ρ=0.1 ohms-m  Diameter of the…

Q: 3) Calculate the resistance of a cross-sectional area A Od mm) and resistivity A(50*10 Fl the wire…

A: Given: The length of the wire is, l=100 m Cross sectional area, A=0.1 mm2=0.1×10-6 m2 Resistivity of…

Q: 16. A wire with a resistance of 65 ohms has a length of 125 ft. The wire is stretch uniformly to 150…

A: Resistance opposes the flow of current. The resistance of element having voltage V across  it  and…

Q: The resistance of Copper conductor at 20 oC is 330 Ω. Find Resistance at 700oC.

A: As per the guidelines, we supposed to answer one question at a time so please ask other questions…

Q: 2. How long is a wire made from 100 cm' of copper if its resistance is 8.5 ohms? The resistivity of…

A:

Q: A wire of 0.14 mm diameter and specific resistance 9.6 micro ohm-cm is 440 cm long. The resistance…

A: Diameter of wire is given,  d=0.14 mm=0.014 cm Area of cross section is given by,…

Q: Determine the resistance of a copper wire that has a cross-sectional area as 8.4 mm2. The length and…

A: Resistance of the wire R?  Cross sectional area A= 8.4 mm2  Wire length l= 78.6m  Resistivity =…

Q: aluminum cable has a resistance of 44 at 30C. calculate the resistance of the cable when the sun…

A: In this question we will find resistance at given temperature..

Q: The resistivity of a copper rod 50 ft. long and 0.25 inch in diameter is 1.76 microhm-cm at 20°

A: In this question we will find resistance of copper rod...

Q: If 24 resistances, each of value 72 ohms are connected in parallel, then the total resistance is?…

A:

Q: A silver wire has a resistance of 2.5 ohms. What will be the resistance of manganin wire having a…

A: Given, R1=2.5 Ωd2=d12l2=l14ρ2=25ρ1 For silver wire, R1=ρ1l1A1 For manganin wire, R2=ρ2l2A2

Q: In a resistance thermometer, a metal wire shows a resistance of 500 ohms at ice point and 550 ohms…

A: Given: R0°C=500 ΩR100°C=550 Ω

Q: Problem 5. Calculate the cross-sectional area, in mm², of a piece of copper wire, 40 m in length and…

A: Given: A piece of copper wire having resistance, R=0.25 Ω Length, l = 40 m Resistivity, ρ=0.02×10-6…

Q: If a wire is drawn out to four times its original length, by how many times would you expect its…

A:

Q: In the formula for finding the resistance of a piece of copper wire , the value k indicates____. A.…

A: Solution: VD = 1.732 X K X Q X I X D /CM for 3 phase VD = voltage drop Q = Alternative current D =…

Q: A copper bar has a length of 20 ft, width of 4 inches and thickness of 0.5 inch. If the resistivity…

A: Given that  L=20 ftW=4 incht=0.5 inchρ=10.37 Ω-CM/ft

Q: 4.If the resistance of a copper wire at freezing (0°C) is 30 2, what is its resistance at -40°C?

A: It is given that: R1=30 ΩT1=0°CT2=-40°C

Q: The resistance of a wire varies directly with its length and inversely with the square of its…

A: Given a wire of same material, Case (1), Resistance of wire, R1=80 Ω Length of wire, L1=100 ft…

Q: A rectangular bus bar has a cross-section of ½ by 1 ¾ inch. And is 25ft long. What is its resistance…

A: Given: Cross-section of ½ by 1 ¾ inch25 feet=7.62 mT=20oC

Q: A copper wire having a diameter of 0.80 mm is measured to have a resistance of 10.3 Ω at 20 o C. How…

A: This question belongs to circuit theory . It is based on the relation among resistance , length ,…

Q: If the resistance of a certain wire is 4.068 ohms per 1000, what is the length of a piece of this…

A: If the resistance of a certain wire is 4.068 ohms per 1000 meter, what is the length of a piece if…

Q: A wire has a resistance 10 ohm. It is stretched by one tenth of the original length. Then itsi…

A: Given, a wire has a resistance 10 ohm. It is stretched by one tenth of the original length. Let,…

Q: The length and diameter of copper wire are found to be 100 and 0.002 m respectively consider that…

A:

Q: A wire having an area of cross section = 4mm² and another wire having an area of cross section 6mm²,…

A:

Q: The resistance of a wire with length of 6.7 mile and diameter of 0.5 in and conductivity of 3.20 S/m…

A: Given data, Length = 6.7 mile, Conductivity = 3.20 S/ m , Diameter = 0.5 meters. We know resistivity…

Q: QUESTION 9 "What happens to the resistance of a piece of wire, if it is strtched to double its…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: The resistance of a silver  wire at 300C is 3 ohms. The temperature coefficient of resistance of…

A: R=Rref(1+α(T−Tref)) where,     R = the resistance at temperature, T    Rref = the resistance at…

Q: A copper rod of 10m long has a diameter with one inch. If the resistivity of copper is 10.371 ohms…

A: Given Length = 10m  Diameter = 1 inch = 2.54 cm = 0.0254 m Radius = 0.0127 m

Q: A wire of diameter 0.550 mm and length 45.0 m has a measured resistance of 2.80 2. What is the…

A: Given thatDiameter=0.550mmlength=45.0mResistance=2.80Ω

Q: . A wire with a resistance of 65 ohms  has a length of 125 ft. The wire is stretch uniformly to 150…

A:

Q: the resistance of a wire is 126.48 ohms at 100 °C and 100 ohms at 25 °C . determine the temperature…

A: Given at T =100 C , r100 =126.48 At T =25 0 c r25  =100 And c 0 =? Rt =Ro (1+c triangle t) At T…

Q: 15-ft length of wire with a cross-sectional area of 127 cmils has a resistance of 8.74 ohms at 20…

A:

Q: what is the resistance of 30 ft of silver wire with a diameter of 0.040 inches. at 20°C

A:

Q: Determine the resistance of a busbar made of copper if the length is 16 meters long and the cross…

A:

Q: If a length of AWG #24 wire has a resistance of 1 ohm, what is the resistance of the same length of…

A: Given: The two wires are: 24 AWG and 27 AWG Length of both wire is same. Resistance of 24 AWG wire…

Q: What will be the length of a 10 ohm wire, when the resistivity of the wire is 0.1 ohms-m and…

A:

Q: A wire with 3 micron radius is made from 9 cm copper, 0.5 cm iron, and 11 cm copper all joined end…

A: Calculate the area. A=π4d2 Substitute the given value in the above equation. A=π43×10-62…

Q: Please answer it with complete solution with explanation! Thank you. Calculate the resistance at…

A: Givendiameter d=56.74 mm=56.74*0.1 cm =5.674 cmlength=304.8 m=30480 cmresistivity ρ=1.724 *10-6…

Q: What is the resistance of a piece of copper wire that has a size of 2.5 mil-feet if 1 mil-foot has a…

A:

Q: Explain what is the relation of the following devices to electrical safety. 1. Garment steamer 2.…

A: Electrical safety involve in  1. Garment steamer 2. Oven toastet 3. Flat iron (for clothes)

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).