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Electronic Devices and Circuits

Electronic Devices and Circuits
When avalanche breakdown occurs covalent bonds are not affected.

True
False

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Electronic Devices and Circuits
The sensitivity of human eyes is maximum at

Violet portion of spectrum
Green portion of spectrum
Red portion of spectrum
White portion of spectrum

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Electronic Devices and Circuits
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.

True
False

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Electronic Devices and Circuits
Which variety of copper has the best conductivity?

Induction hardened copper
Hard drawn copper
Copper containing traces of silicon
Pure annealed copper

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Electronic Devices and Circuits
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

In arbitrary direction
In the direction of current
Antiparallel to magnetic field
Normal to both current and magnetic field

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Electronic Devices and Circuits
For a NPN bipolar transistor, what is the main stream of current in the base region?

Drift of electrons
Diffusion of electrons
Drift of holes
Diffusion of holes

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