Q$-2)$ A thermistor has a resistance temperature coefficient of $-4\%$ over a temperature

range of $25$ C to $50$ C$.$ lf the resistance of the thermistor is $400\backslash$Omega at $25$ C$,$ what is the

resistance at $35$ C$?$

Q$-3)$ Explain the working principle of Relay?

Q$-4)$ For an inverting amplifier calculate the value of R$1$ and RF such that the voltage gain

is $10$ and the total resistance used is $50$K$\backslash$Omega $.$

Q$-5)$ What would be the largest output of an $8-$bit DAC that produces $1$ V for the digital input

$01111010?[2]$

Q$-6)$ Derive the output voltage of Inverting amplifier and Differential amplifier. $[2]$

Q$-7)$ The induces EMF in a d$.$c$.$ machine while running at $600$ rpm is $200$V$.$ Calculate the

induced emf while the machine running at $800$ rpm$.$ Assume constant flux.

Q$-8)$ Explain the reason why single phase induction motor is not self$-$starting?

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