MHT CET 2021 20th September Morning Shift | Semiconductor Devices and Logic Gates Question 129 | Physics

The frequency of a given a.c. signal is 'N' Hz. When it is connected to a half wave rectifier, the number of output pulses given by the rectifier in 1 second is

$$\mathrm{\frac{N}{4}}$$

$$\mathrm{\frac{N}{2}}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-0

Silicon and copper are cooled from 300 K to 100 K, the specific resistance (resistivity)

increases in both copper and silicon

decreases in both copper and silicon

decreases in copper and increases in silicon

increases in copper and decreases in silicon

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

A transistor having $\alpha=0.8$ is connected in common emitter configuration. When the base current changes by 6 mA , then the change in collector current is

12 mA

24 mA

0.66 mA

1.5 mA

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

In an intrinsic semiconductor, at an ordinary temperature, the correct relation between the number of electrons per unit volume $n_e$ and number of holes per unit volume $n_h$.

$n_e=n_n$

$n_e>n_n$

$n_e< n_h$

$n_e=n_h=0$

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