Bissoy.com
Doctors Medicines MCQs Q&A

Which one of the following materials is having the highest electrical conductivity at room temperature?

Which one of the following materials is having the highest electrical conductivity at room temperature? Correct Answer Silver

• Electrical conductivity is the measure of a material’s ability to allow the transport of an electric charge.

• In metals with an increase in temperature conductivity decreases (i.e. resistivity increases) because with an increase in temperature, there is no appreciable increase in carrier concentration, but a significant decrease in average collision time.

• Silver has the highest electrical conductivity at room temperature.

Note:

The resistivity and conductivity of different material at room temperature is shown in the following table:

Material

Resistivity

ρ (Ω.m) at 20°C

Conductivity

σ (S/m) at 20°

Silver

1.59 × 10-8

6.30 × 107

Copper

1.68 × 10-8

5.96 × 107

Gold

2.44 × 10-8

4.1 × 107

Aluminium

2.65 × 10-8

3.77 × 107

Platinum

1.06 × 10-7

0.943 × 107

Related Questions

The following question, there are three statements I, II and III. Read the question carefully and mark your answer according to which statements(s) is/are sufficient to the answer the question. Find the total cost of flooring a room? Statement I: The length of the room is 70% more than the breadth of the room Statement II: The cost of flooring some other room whose length is twice the length of the given room and breadth is one third of the breadth of the given room is Rs.3000 less than the cost of flooring of given room Statement III: The perimeter of the room is 90 m and cost of flooring is Rs. 20 per m2
Hotel Aditya has 10 single AC rooms, 5 double AC rooms and 18 non AC rooms. The fixed monthly rent of hotel is 150,000. The per day maintenance cost is Rs. 100 for double AC room, Rs. 75 for single AC room and Rs. 40 for non AC room. The per day charges are Rs. 600 for double AC room, Rs. 400 for single AC room and Rs. 250 for non AC room. In April 2003, the occupancy rate of non AC room was 50%, 70% of single AC room and 40% of double AC rooms. Find the profit/loss % for that particular month.
Seven people A, B, C, D, E, F and G live on separate floors of a 7-floor building. Ground floor is numbered 1, first floor is numbered. 2 and so on until the topmost floor is numbered 7. Each one of these having a different cars-Cadillac, Ambassador, Fiat, Maruti, Mercedes, Bedford and Fargo but not necessarily in the same order. Only three people live above the floor on which A lives. Only one person lives between A and the one having a car Cadillac. F lives immediately below the one having a car Bedford. The one having a car Bedford lives on an even-numbered floor. Only three people live between the ones having a car Cadillac and Maruti. E lives immediately above C. E is not having a car Maruti. Only two people live between B and the one having a car Fargo. The one having a car Fargo lives below the floor on which B lives. The one having a car Fiat does not live immediately above D or immediately below B. D does not live immediately above or immediately below A. G does not have a car Ambassador. Question : How many people live between the floors on which D and the one having a car Bedford ?
The average area of 2 rooms I and II are 400 square meters. If one rectangular room(III) area is added then the average area becomes 500 square meters. If another room IV, whose area is 600 square meters more than the III room, replaces room I, then the average area of II, III and IV room becomes 900 square meters. Find the area of I room.
The average area of 3 square rooms I, II, and III are 1600 square meters. If one rectangular room(IV) area is added then the average area becomes 1400 square meters. If another room V, whose area is 400 square meters more than the IV room, replaces room I, then the average area of II, III, IV, and V room becomes 1350 square meters. Find the area of I room.
A room whose length is 40% more than the breadth. The Perimeter of the floor of the room is 96 cm and the height of the room is 4/7 of the length of the room. If there is whitewashing in the room, the cost of whitewash is Rs.50 per cm2. Find the total cost in the whitewash of the whole room except the floor.
Consider the following statements about thermal conductivity: 1) Thermal conductivity decreases with increasing molecular weight 2) Thermal conductivity of non-metallic liquids generally decreases with increasing temperature 3) Thermal conductivity of gases and liquids is generally smaller than that of solids Which of the above statements are correct?
The following question, there are three statements I, II and III. Read the question carefully and mark your answer according to which statements(s) is/are sufficient to the answer the question. Find the cost of the painting of the four walls of the room. Statement I: The perimeter of the floor of the room which is rectangular in shape is 56cm Statement II: The cost of painting one of the largest wall of the room is Rs. 850 Statement III: The area of the four walls of the room is 45 sq. more than the area of the roof of the room
A type I superconductor is 1. A conductor of infinite conductivity at all temperatures. 2. A conductor with a very large conductivity below a critical temperature. 3. A material showing susceptibility -1 below the critical temperature. 4. A perfect conductor having conductivity drastically reduced by a critical current.
Principle: A person who voluntarily takes a decision to do something after appreciating the risk involved in such act and then receives an injury, will not be entitled to get any compensation.
Facts: 'X', an electrical engineer, was invited by his friend 'Y', to the factory where he was employed. While they were in the factory, 'Q' a worker in the factory informed 'Y' about some short-circuit in the power room. Hearing this, 'Y' asked 'X' to stay in the office room and rushed to the power room. 'X' however, decided to follow 'Y'. 'X' noticed that if the power supply through a particular electric line could be disconnected, the electrical leakage could be stopped which would prevent further damage. Suddenly 'X' decided to pullout the wire manually even though it was risky. This resulted in a blast in which both 'X' and 'Y' got injured. 'X' had to spend Rs. 1 lakh at the hospital for his treatment. 'X' wants to file a suit for compensation from the management of the factory. Will he succeed?