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

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

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Electronic Devices and Circuits
Assertion (A): In p-n-p transistor collector current is termed negative.Reason (R): In p-n-p transistor holes are majority carriers.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is false but R is true
A is true but R is false

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