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Question
A triode is operated in the linear region of its characteristics. If the plate voltage is slightly increased, the dynamic plate resistance will __________ .
Options
increase
decrease
remain almost the same
become zero
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Solution
remain almost the same
Dynamic resistance (rP) is given by,
`r_p=(DeltaV_p)/(Delta i_p)`
The triode is operating in the linear region. Therefore,
Change in the value of voltage = Change in the value of current
So, (rP) will remain almost the same.
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