Electrical Engineering Materials MCQ Questions & Answers | Electrical Engineering Page-5 section-1

41.
Carbon resistors are used extensively because they are

A. Easy to make

B. Compact

C. Inexpensive

D. All of the above reasons

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42.
The current due to electron flow in conduction band is the hole current in valence band.

A. Equal to

B. Less than

C. Greater than

D. Any of the above

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43.
The metal having the lowest temperature coefficient of resistance is

A. Gold

B. Copper

C. Aluminium

D. Kanthal

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44.
A perfect conductor has

A. Zero conductivity

B. Unity conductivity

C. Infinite conductivity

D. None of the above

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45.
For a particular material the Hall coefficient was found to be zero. The material is

A. Insulator

B. Metal

C. Intrinsic semiconductor

D. None of the above

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46.
Total number of crystal systems is

A. 2

B. 4

C. 7

D. 12

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47.
Superconductors are becoming popular for use in

A. Generating very strong magnetic field

B. Manufacture of bubble memories

C. Generating electrostatic field

D. Generating regions free from magnetic field

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48.
In graphite, bonding is

A. Covalent

B. Metallic

C. Vander Waals

D. Vander Waals and covalent

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49.
The converse of hardness is known as

A. Malleability

B. Toughness

C. Softness

D. None of the above

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50.
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?

A. Nichrome

B. Constantan

C. Kanthal

D. Molybdenum

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Electrical Engineering Materials MCQ Questions & Answers | Electrical Engineering

41. Carbon resistors are used extensively because they are

Answer & Solution

42. The current due to electron flow in conduction band is the hole current in valence band.

Answer & Solution

43. The metal having the lowest temperature coefficient of resistance is

Answer & Solution

44. A perfect conductor has

Answer & Solution

45. For a particular material the Hall coefficient was found to be zero. The material is

Answer & Solution

46. Total number of crystal systems is

Answer & Solution

47. Superconductors are becoming popular for use in

Answer & Solution

48. In graphite, bonding is

Answer & Solution

49. The converse of hardness is known as

Answer & Solution

50. Which of the following resistive materials has the lowest temperature co-efficient of resistance ?

Answer & Solution

41.
Carbon resistors are used extensively because they are

42.
The current due to electron flow in conduction band is the hole current in valence band.

43.
The metal having the lowest temperature coefficient of resistance is

44.
A perfect conductor has

45.
For a particular material the Hall coefficient was found to be zero. The material is

46.
Total number of crystal systems is

47.
Superconductors are becoming popular for use in

48.
In graphite, bonding is

49.
The converse of hardness is known as

50.
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?