Hi,
could someone please explain why the LED glows in the following circuit without any base voltage when I touch the base lead. I observe that when I touch the base the Vbe voltage reads as 3.7V, when not touched it is fluctuating at 300mV. The transistor is MJE3055T.
I thought the transistor can conduct only when the base-emitter is forward biased but without any direct voltage just by touching the base the transistor seems to conduct??
Thanks
Arvind
could someone please explain why the LED glows in the following circuit without any base voltage when I touch the base lead. I observe that when I touch the base the Vbe voltage reads as 3.7V, when not touched it is fluctuating at 300mV. The transistor is MJE3055T.
I thought the transistor can conduct only when the base-emitter is forward biased but without any direct voltage just by touching the base the transistor seems to conduct??
Thanks
Arvind
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