AIPMT 2006 Mock Test

Which of the following is an example of forward biasing?

A photo-cell employs photoelectric effect to convert:

The core of a transformer is laminated because :

Two coils of self-inductance $2\text{mH}$ and $8\text{mH}$ are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is:

In a discharge tube ionization of enclosed gas is produced due to collisions between: