Description : Diamond is a good thermal conductor. But it is an excellent electrical insulator. How?
Last Answer : Diamond crystal is a three-dimensional network of carbon atoms. All carbon atoms in the network are strongly bonded by carbon-carbon covalent bonds. Therefore diamond crystal has a highly ... in diamond crystal to ficilitate electrial conduction. Thus diamond is an excellent electrical insulator.
Description : Graphite is a/an (A) Electrical insulator (B) Allotrope of carbon (C) Moderator used in nuclear reactor (D) Both (B) and (C)
Last Answer : (C) Moderator used in nuclear reactor
Description : Heating of ferromagnetic materials to a temperature above Curie temperature makes it (A) Insulator for heat & electricity transmission (B) Ferritic (C) Behave like paramagnetic materials (D) Superconductor
Last Answer : Option C
Description : Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator
Last Answer : (3) semi-conductor Explanation: Semiconductors are insulators at low temperatures and reasonably good conductors at higher temperatures. As temperature increases, the semiconductor material becomes a better and better conductor.
Description : Good conductor of electricity is – (1) dry air (2) paper (3) kerosene (4) graphite
Last Answer : (4) graphite Explanation: Graphite has a tendency to behave very much like a metal because the carbon molecules arrange themselves into a lattice structure. The crystal lattice is the same orientation that ... better than the dry air paper and kerosene and that's what makes it a good conductor.
Description : Generally Non-metals are not conductors of electricity. Which of the given is a good conductor of electricity? a) Diamond b) Graphite c) Sulphur d) Fullerene
Last Answer : b) Graphite
Description : The electrode for a battery must be A. A semi conductor B. An insulator C. A good conductor of electricity D. A bad conductor of electricity
Last Answer : C. A good conductor of electricity
Last Answer : semi-conductor
Description : Good conductor of electricity is (1) dry air (2) paper (3) kerosene (4) graphite
Last Answer : graphite
Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : Which one of the following is a good electrical conductor? (1) Graphite (2) Diamond (3) Peat (4) Charcoal
Last Answer : (1) Graphite Explanation: Graphite is a good conductor of electricity because its electrons are delocalized or free to move around. Each carbon atom in graphite is directly linked to only three carbon atoms ... and the fourth is relatively free and can move from one car-bon atom to the other.
Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator
Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects
Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator
Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects.
Description : A 'dielectric' is a/an ________________. A. electrical insulator B. current flow C. good conductor D. semiconductor material
Last Answer : Answer: A
Last Answer : Graphite
Description : What is the thermal conductivity of a perfect heat insulator? (A) Zero (B) One (C) ∞ (D) Between 0 and ∞
Last Answer : (A) Zero
Description : Why are Metals good conductor of heat than insulator? -General Knowledge
Last Answer : The answer is 'They contain free electrons'
Last Answer : answer:
Description : Why are Metals good conductor of heat than insulator?
Last Answer : They contain free electrons
Description : 1. Which is considered a hot-spot of biodiversity in India? 2. What does the special status of Jammu and Kashmir imply? 3. Why are Metals good conductor of heat than insulator? 4. Where ... the earth's crust? 20. The Mansabdari system introduced by Akbar from which system was it borrowed from?
Last Answer : Answer : 1 1. Western Ghats 2. A separate Constitution 3. They contain free electrons 4. Off the coast at Rameshwaram 5. Bhoja Paramara 6. Wilson Jones 7. R.N. Tagore 8. Niche 9. Shrimp 10. ... km 15. Firoz Tughlaq 16. Dr. Zakir Hussain 17. Vitamin C 18. Government grants 19. Oxygen 20. Mongolia
Description : Asbestos (A) Is an excellent insulator for heat and electricity (B) Is fire-proof and acid proof (C) Has sp. gravity equal to 3.10 (D) All the abo
Last Answer : Answer: Option D
Description : In nuclear reactors, graphite is used as a/an – (1) fuel (2) lubricant (3) moderator (4) insulator
Last Answer : (3) moderator Explanation: A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Most commonly they are used for generating electricity and for the ... turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-235.
Description : In nuclear reactors, graphite is used as a/an (1) fuel (2) lubricant (3) moderator(4) insulator
Last Answer : moderator
Description : Presence of high concentration of ozone and smog in atmospheric air causes the (A) Embrittlement & decrease of folding resistance of paper (B) Cracking of rubber products (C) Fading of dye on textiles (D) Damage of electrical insulator on high tension power line
Last Answer : (B) Cracking of rubber products
Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.
Description : Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last Answer : copper is a better conductor of electricity than iron
Description : Materials having resistivity ranging from 1 to 100 ohm. cm is termed as (A) Conductor (B) Insulator (C) Semi-conductor (D) None of these
Last Answer : (C) Semi-conductor
Description : Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor) (A) A (B) l (C) A2 (D) Both 'a' & 'b'
Last Answer : (D) Both 'a' & 'b'
Description : Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of (A) Concrete (B) Steel (C) Zircaloy (D) Graphite
Last Answer : (B) Steel
Description : Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium (A) Tin, nickel, iron and chromium (B) And graphite
Last Answer : (A) Tin, nickel, iron and chromium
Description : Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is (A) IR (B) I 2R (C) IR 2 (D) I 2R
Last Answer : (B) I 2R
Description : Why gold are good conductor of heat and electricity?
Last Answer : What is the answer ?
Description : Consider the following statements: 1. Mica is good conductor of heat. 2. Mica is a bad conductor of heat. 3. Mica is a good conductor of electricity. 4. Mica is a bad conductor of electricity. Which of the above statements is/are correct? (a) 1 only (b) 1 and 4 (c) 1 and 3 (d) 2 and 4
Last Answer : Ans:(b)
Description : Which of the following is a good conductor of heat but bad conductor of electricity? (1) mica (2) asbestos (3) celluloid (4) paraffin wax
Last Answer : (1) mica Explanation: Mica is a good conductor of heat but bad conductor of electricity.
Description : Which of the following is a good conductor of heat but a bad conductor of electricity? (1) Celluloid (2) Rubber (3) Asbestos (4) Mica
Last Answer : (4) Mica Explanation: Good conductors of heat are good conductors of electricity. Mica is an exception which although being a good conductor of heat and a bad conductor of electricity. It is commonly ... to assist in the transfer of the generated heat to the heat sink or chassis for dissipation.
Description : Which substance is a bad conductor of electricity but a good conductor of heat
Last Answer : Mica
Description : 1. What is the main constituent of haemoglobin? 2. By whom is the Prime Minister appointed? 3. Which substance is a bad conductor of electricity but a good conductor of heat? 4. When it is noon ... maps of India? 20. By whom the Mahatma Gandhi was referred to Father of the Nation' first?
Last Answer : Answer : 1. Iron 2. President 3. Mica 4. 0°E or W 5. Gandhara 6. National income 7. Faiz Ahmed Faiz 8. 8 9. Divergent movement 10. Shahjahan 11. The President 12. Black 13. Amir ... Ram Das 16. Prime Minister 17. Artery 18. Defence Minister 19. Geographical Survey of India 20. Subhash Chandra Bose
Description : Which of the following is a good conductor of heat but bad conductor of electricity ? (1) mica (2) asbestos (3) celluloid (4) paraffin wax
Last Answer : mica
Description : Which of the following is a good conductor of heat but a bad conductor of electricity ? (1) Celluloid (2) Rubber (3) Asbestos (4) Mica
Description : Best conductor of heat and electricity is (A) nickel (B) copper (C) chromium (D) aluminium
Last Answer : Best conductor of heat and electricity is copper
Description : Ordinary glass is not a/an (A) Amorphous isotropic material (B) Supercooled liquid (C) Material with sharp definite melting point (D) Electrical insulator
Last Answer : (C) Material with sharp definite melting point
Description : Penny conductor or insulator?
Last Answer : Copper is a conductor, so and pennies are coated in copper.
Description : Is a coin a insulator or a conductor?
Last Answer : A very good conductor.
Description : Is Rubber insulator or conductor?
Last Answer : Rubber is an insulator.
Description : Is wood a conductor or a insulator?
Last Answer : Wood is a conductor, though not a very good one.
Description : Is styrofoam insulator or conductor?
Last Answer : Styrofoam is an insulator.
Description : Is copper insulator or conductor?
Last Answer : Conductor, which is why it's used for wires.
Description : Is plastic insulator or conductor?
Last Answer : Plastic is an insulator.
Last Answer : conductor Money Conductor , guide , electrically conductive , cm _ _ _ Contactor Money Pre Director , Insulator Money Non-conductive Objects.
Description : In your own words explain the difference between a conductor and an insulator?
Last Answer : Need answer