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

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

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Electronic Devices and Circuits
Assertion (A): A JFET can be used as a current source.Reason (R): In beyond pinch off region the current in JFET is nearly constant.

A is false but R is true
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 true but R is false

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Electronic Devices and Circuits
An intrinsic silicon sample has 1 million free electrons at room temperature. As the temperature is increased

The number of free electrons and holes increase but not by the same amount
The number of free electrons and holes increase by the same amount
The number of free electrons increases but the number of holes decreases
The number of free electrons increases

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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.

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

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