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Chapter 19: Problem 2652
What kind of device is a diode? (A) Bilateral (B) Linear (C) Nonlinear (D) Unipolar
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The number of holes and electrons in an intrinsic conductors are \(\mathrm{x}\)
and \(\mathrm{y}\) respectively at room temperature. Which of the following
options are true?
(A) \(x>y\)
(B) \(\mathrm{y}>\mathrm{x}\)
(C) \(x=y\)
(D) \(x<
A light emitting diode has a voltage drop of \(2 \mathrm{~V}\) across it when \(10 \mathrm{~mA}\) current is passed. If this \(\mathrm{LED}\) is to be operated with \(6 \mathrm{~V}\) battery the value of limiting resistor would be (A) \(400 \Omega\) (B) \(4000 \Omega\) (C) \(40 \mathrm{k} \Omega\) (D) \(300 \Omega\)
When source voltage increases in a zener diode, which of these current remains approximately constant? (A) Series current (B) Zener current (C) Load current (D) Total current
In a N-P-N transistor circuit, the emitter, collector and base current are respectively \(\mathrm{I}_{E}, I_{C}\) and \(I_{B} .\) The relation between them is (A) \(\mathrm{I}_{\mathrm{C}}<\mathrm{I}_{\mathrm{E}}<\mathrm{I}_{\mathrm{B}}\) (B) \(\mathrm{I}_{\mathrm{B}}<\mathrm{I}_{\mathrm{C}}<\mathrm{I}_{\mathrm{E}}\) (C) \(\mathrm{I}_{\mathrm{B}}>\mathrm{I}_{\mathrm{C}}<\mathrm{I}_{\mathrm{E}}\) (D) \(\mathrm{I}_{\mathrm{B}}>\mathrm{I}_{\mathrm{C}}>\mathrm{I}_{\mathrm{E}}\)
Digital circuits can be made to be respective use of: (A) AND gate (B) OR gate (C) NOT gate (D) NAND gate
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