Electricity and Magnetic Fundamentals

101. Lenz' law states that the direction of the induced emf and hence current

1. Is determined by the rate of current flux
2. Is found by the right hand rule
3. Is found by the left hand rule
4. Always opposes the cause producing it

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102. Lenz's law is the consequence of the law of conservation of

1. Energy
2. Charge
3. Field lines
4. Momentum

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103. Magnetic effects of the earth as a huge magnet with north and south poles.

1. Diamagnetic
2. Ferromagnetic
3. Terrestrial magnetism
4. Terrestrial ferromagnetism

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104. Magnetic field intensity is a _________ quantity.

1. scalar
2. phasor
3. vector
4. variable

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105. Magnetic fields do not interact with

1. Moving permanent magnets
2. Stationary permanent magnets
3. Moving electric charges
4. Stationary electric charges

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106. Magnetic intensity is a

1. Phasor quantity
2. Physical quantity
3. Scalar quantity
4. Vector quantity

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107. Materials that have very high permeabilities (hundreds and even thousands times of that of free space)

1. Paramagnetic
2. Non- magnetic
3. Ferromagnetic
4. Diamagnetic

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108. Materials whose permeabilities are slightly greater than that of free space

1. Paramagnetic
2. Non- magnetic
3. Ferromagnetic
4. Diamagnetic

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109. Mmf in a magnetic circuit corresponds to _________ in an electric circuit

1. Emf
2. Voltage drop
3. Electric Field Intensity
4. Potential gradient

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110. Ohm∧s law can be used only to a _________ circuit or component.

1. Unilateral
2. Exponential
3. Trivalent
4. Linear

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