Materials and Components
The conductivity of intrinsic semiconductor is given by
Answer: B
For intrinsic semiconductor,
Conductivity = (Electron charge) x (Number of charge carriers) x (Sum of mobilities of holes and electrons).
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The temperature coefficient of a thermistor
Answer: B
No answer description available for this question.
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The hysteresis loss is
Answer: A
No answer description available for this question.
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In carbon resistor colour code, the third band is red. It indicates
Answer: A
No answer description available for this question.
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If the diameter of a wire is doubled, its current carrying capacity becomes
Answer: D
Current carrying capacity depends on area of cross-section.
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Nichrome is used for
Answer: B
No answer description available for this question.
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A material which is lightly repelled by a magnetic field is known as
Answer: A
No answer description available for this question.
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The number of valence electrons in pentavalent impurity is
Answer: A
Pentavalent means 5 valence electrons.
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If e is the charge of an electron, R is the radius of its orbit and ω is the angular velocity of electron, the magnetic dipole moment μm of the orbit is |μm| = eωR2.
Answer: B
1 μm 1 = 0.5 eωr2.
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Assertion (A): In a parallel plate capacitor having area of plate 1 m2 and plate separation 1 m, the capacitance C and resistance R are given by C = ∈0∈'r and R = 
where ω is frequency, ∈r' and ∈r" are real and imaginary parts of dielectric constant.
Reason (R): The imaginary part of electric constant is responsible for dielectric losses.
Answer: A
No answer description available for this question.
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