Indian Navy 10+2 B.Tech Cadet Semiconductor Devices — practice questions

Explore 2 free Semiconductor Devices questions in Indian Navy 10+2 B.Tech Cadet Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Semiconductor Devices questions and exercises with answers

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Conductivity of a material is highest in:Read the answer and worked solution →Order the steps of EM wave generation by an accelerating chargeRead the answer and worked solution →

Worked practice questions

Conductivity of a material is highest in:

Semiconductor
Vacuum
Insulator
Metal (conductor)

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Correct answer: D. Metal (conductor)

Metals have very high conductivity (~10⁷ S/m) due to free electrons. Semiconductors are intermediate (10⁻⁴ to 10⁴ S/m), insulators very low (<10⁻⁸ S/m).

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Order the steps of EM wave generation by an accelerating charge

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Steps

Charge accelerates, creating a changing electric field
Changing E-field induces a changing magnetic field
Changing B-field induces a changing E-field further away
The coupled E and B fields propagate outward as a wave
Wave travels in vacuum at c = 3×10⁸ m/s

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