The resistance of a wire is 126.48 ohms at 1000C  and 100 ohms at 300C. The temperature coefficient of this wire at 00C is ____________per C0.

Q: Q2) In the load test, is the iron loss present?

A:

Q: If a wire is made of a material that has zero resistance at -123.40C, its temperature coefficient of…

A:

Q: Explain how the resistances of common metallic conductors vary with temperature.

A: What is resistances in a material? Obstacle to the flow of electron in a material is called the…

Q: What is the common type in electricity in underground cables

A: In this question , we will see common types of underground cables..

Q: A certain conductor has a resistivity of 2.126 micro-ohm-centimeter.  What is its resistivity in…

A: To convert the resistivity of a material from micro-ohm-centimeter to ohm-cmil/ft, we can use the…

Q: A conductor with a will cause a smaller voltage drop, since its resistance is smaller. O a. large…

A: we know R=ρlA So R∝1A

Q: In a natural circulation solar water heater, collector has a glass cover on the top and an material…

A: Solar water heater uses solar thermal collector to heat the water by sunlight.

Q: A voltage source an IR drop of 40 volts across a 20 ohms R1, 60 volts across a 30 ohms R2, and 180…

A: given

Q: What is the Correlation between Resistivity and Earth Materials?

A: Resistivity is basically a factor that helps in determining the characteristic property of any…

Q: 70. A circuit supplies a continuous load of 38 amperes and is protected by a 50-amperecircuit…

A: While calculating the conductor size for a continuous load, take 125% of overloading conditions…

Q: The minimum size for copper branch conductors in a dwelling is

A: The minimum size for copper branch conductors in a dwelling is

Q: TII 6.) A 12hp, 230 V is to be operated at an ambient temperature of 46⁰C, the THW conductor size to…

A: It asked to determine the THW conductor size to be used in a 12 hp, 230 V is to be operated at an…

Q: 7. What will happen to the resistance of a conductor if we reduce its cross- sectional area by a…

A: We need to select correct option for given statement

Q: 41. A silicon solar cell produces about a. 0.5 volts/cell b. 1.0 volts/cell C. 1.5 volts/cell d. 2.2…

A: Approximate value of the voltage across Silicon diode is 0.5 to 0.7 volt per cell so the closest…

Q: Explain the types of insulator used in overhead transmission and distribution lines and mention…

A: As overhead insulation, transmission lines can utilize one of five different types of insulators: 1.…

Q: -advantages and disadvantages of Series and parallel connections of solar cell ? B-Which of the…

A: Series: S.NO Advantages Disadvantages 1 Voltage rating can be increased If any cell gets…

Q: Discuss the arcing phenomenon in a circuit breaker. Please write more answer

A: Phenomenon of Arc :- A Circuit breaker consists of two contacts namely "fixed" and "moving contacts"…

Q: Three types of electric devices A, B, and C are connected in series across a 115-volt ac source, and…

A: In thid question we will find given device types with given information...

Q: Explain the process of testing insulation resistance and withstand voltage test

A: Insulation resistance test and withstand voltage test.

Q: 3- For a (1 kQ) copper composition resistor with a temperature coefficient at (20°C) 0.00393,…

A: The solution can be achieved as follows.

Q: What is factor of a cable at 5 degrees celcius when calculating resistance

A: The solution is provided in the following section.

Q: 4. A company was low on copper metal and decided to use some chemical additives just this once to…

A: Conductivity of copper : conductivity is property of copper which allows to flow electric current…

Q: A 14/2 type NM copper used for a general lighting branch circuit Ampacity : Maximum fuse or circuit…

A: Circuit breaker:- Circuit breakers are used for safety purpose in electrical equipment. It is used…

Q: A certain conductor has a resistivity of 11.803 ohm-cmil/ft. What is its resistivity in…

A: As  1 circular mil ohm/foot =  1.66242611301008 × 10-9 ohm meter Or 1 cmil ohm/ ft =…

Q: 6. A length of a copper telephone line has a resistance of 24 ohms at 20°C. What is the resistance…

A: Note: As per our policy we can solve only one question, please re-upload the remaining question as a…

Q: A certain conductor has a resistivity of 2.905 micro-ohm-centimeter.  What is its resistivity in…

A:

Q: Two tram cars (A & B) 3 km and 8 km away from a sub-station return 60 A and 40 A respectively to the…

A: Given that Two tram cars (A & B) 3 km and 8 km away from a sub-station return 60 A and 40 A…

Q: A certain conductor has a resistivity of 10.040 ohm-cmil/ft. What is its resistivity in…

A:

Q: a. What does make a current flow in circuit? Justify your answer. b. Explain the difference between…

A:

Q: With a thermal circuit breaker what are the two main causes of heating of the bimetallic strip ?

A: Thermal circuit breakers are the most used breakers in many fields. As they have the fastest speed…

Q: A certain resistance was measured to be 30 ohm at 20°C and 35.1 Ohm at 81°C. Find the temperature…

A: Step-1->We have Resistance at at 30 ohmandResistance at at 35.1…

Q: 3. The zero sequence current is times the current in neutral wire.

A: Zero sequence current in all phase are in phase and same magnitude . Neutral current sum of three…

Q: What is the resistance of a copper specimen with an initial resistance of 250 ohms at 30 degrees…

A:

Q: Rating of Fuse for the rated current of 7A is a. 7A b. 10.5A C. 3.5A d. 14A

A:

Q: Two heating units A and B are connected parallel across a 240-volt supply. Unit B takes thrre- times…

A: Voltages are same in parallel and  Power is the product of Voltage and current  So for same voltage…

Q: A fuse element is having _______________ a. high deterioration b. low resistivity c. high melting…

A: Basic properties of fuse element: The material used for fuse elements must be of low melting point,…

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: How does the skin effect phenomenon affect the performance of copper cables?

A: The skin effect is a phenomenon that occurs in conductors carrying high-frequency alternating…

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.