MHT CET 2026 16th April Evening Shift | Semiconductor Devices and Logic Gates Question 24 | Physics

Which of the following statement is NOT correct in the case of LED?
(A) It is a heavily doped p-n junction diode.
(B) It emits light only when it is forward biased.
(C) It emits light only when it is reverse biased.
(D) The energy of the light emitted is equal to or slightly less than the energy gap of the semiconductor used.

MHT CET 2026 16th April Evening Shift

MCQ (Single Correct Answer)

-0

In which of the logic gate the following statement is true? "The output is high when either of the inputs is high but not if both inputs are high"

NAND

NOR

X-OR

MHT CET 2026 16th April Morning Shift

MCQ (Single Correct Answer)

-0

In a transistor amplifier, a change of 0.2 mA in the base current causes a change of 5 mA in the collector current. If input resistance is $2\ \text{k}\Omega$ and voltage gain is 75, the load resistance used in the circuit is

$4\ \text{k}\Omega$

$6\ \text{k}\Omega$

$8\ \text{k}\Omega$

$2\ \text{k}\Omega$

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