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The switching of power with a PNP transistor is called _________

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The switching of power with a PNP transistor is called _________

(a) sourcing current

(b) sinking current

(c) forward sourcing

(d) reverse sinking

This question was addressed to me at a job interview.

Question is taken from Transistor Switching Times in chapter Transistor Characteristics of Electronic Devices & Circuits

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The correct option is (a) sourcing current

For explanation: Sometimes DC current gain of a bipolar transistor is too low to directly switch the load current or voltage, so multiple switching transistors is used. The load is connected to ground and the transistor switches the power to it.

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