1.

For a transistor, the current ratio `beta_(dc)` is defined as the ratio ofA. collector current to emitter current.B. collector current to base current.C. base current to collector current.D. emitter current to collector current.

Answer» Correct Answer - B
The current amplification factor of a transistor for direct current (DC) is the ratio of collector current (`l_(c)`) to the base current (`l_(B)` ) in common emitter configuration i.e.,
`B_(DC)=(I_(C))/(I_(B))`
However, the ratio of collector current to the emitter current gives the value of current amplification factor in common base configuration, i.e.,
`alpha_(DC)=(I_(C))/(I_(E))`


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