Materials and Components - Section 1 Multiple Questions and Answers.
Exercise Questions ::
Materials and Components
Answer: Option C
Explanation:
Energy stored is proportional to capacitance and capacitance is proportional to permittivity.
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2. In paramagnetic materials A. permanent magnetic dipoles exist but the interaction between neighbouring dipoles is negligible B. permanent magnetic dipole do not exist C. permanent magnetic dipoles exist and the interaction between neighbouring dipoles is very strong D. permanent magnetic dipole moment may or may not exist
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Answer: Option A
Explanation:
In paramagnetic materials interaction between neighbouring dipoles is negligible.
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3. Please find the correct values: Assertion (A): Atomic number of sodium is 11.
Reason (R): Sodium has a body centred cubic lattice.
A. Both A and R are true and R is correct explanation of A B. Both A and R are true but R is not correct explanation of A C. A is true but R is false D. A is false but R is true
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Answer: Option B
Explanation:
Atomic number is not dependent on lattice structure.
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Answer: Option B
Explanation:
For intrinsic semiconductor,
Conductivity = (Electron charge) x (Number of charge carriers) x (Sum of mobilities of holes and electrons).
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5. The core of a coil has a length of 10 cm. The self inductance is 8 mH. If the core length is doubled, all other quantities remaining the same, the self inductance will be A. 32 mH B. 16 mH C. 8 mH D. 4 mH
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Answer: Option D
Explanation:
Inductance is inversely proportional to the core length.
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