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Electronic Devices and Circuits

Electronic Devices and Circuits
Power diodes are generally

None of these
Either of the above
Germanium diodes
Silicon diodes

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

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

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

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

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

False
True

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Electronic Devices and Circuits
A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

99
0.99
100
1.01

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Electronic Devices and Circuits
Which one of the following is not a characteristic of a ferroelectric material?

High dielectric constant
Ferroelectric characteristic only above the curie point
No hysteresis
Electric dipole moment

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