Electricity and Magnetic Fundamentals

61. Electromotive force in a circuit

1. causes free electrons to flow
2. increases the circuit resistance
3. maintains circuit resistance
4. is needed to make the circuit complete

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62. Electron is a Greek word for

1. amber
2. Fire
3. Stone
4. Heat

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63. Electronic current in a wire is the flow of _________ electrons.

1. free
2. valence
3. bound
4. loose

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64. Electrons at the outer shell are called

1. Outer shell electrons
2. Inner shell electrons
3. Semiconductor electrons
4. Valence electrons

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65. Flux density is measured in

1. Tesia
2. Weber
3. Ampere- turn
4. Maxwell

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66. Flux linkages equals

1. Flux times area of core
2. Flux times number of turns times area of core
3. Flux times number of turns times length of core
4. Flux times number of turns

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67. Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.

1. Ionic bond
2. Covalent bond
3. Metallic bond
4. Van der Waals bond

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68. Gases whose particles are charged are known as

1. Conductors
2. Insulators
3. Gaseous Conductors
4. Plasma

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69. Germanium atom has _________ protons and _________ electrons.

1. 32, 32
2. 32, 42
3. 42, 32
4. 34, 34

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70. Hipernik is an alloy containing _________ iron and _________ nickel.

1. 4O% ; 6O%
2. 60% ; 40%
3. 50% ; 50%
4. 70% ; 30%

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