List of top Instrumentation Engineering Questions asked in AP PGECET

Which one of the following statements is True?

A Bode plot of a transfer function G(s) is shown in the figure. The gain 'A' in dB at frequency f = 100Hz is:

A McLeod gauge having volume of bulbs and mercury capillary, $V = 100 \times 10^{-6}\text{ m}^3$ and the diameter of measuring capillary is $1\text{ mm}$. For the reading of $60\text{ mm}$, the pressure will be}

The transfer function of the circuit as shown in the figure is expressed as

Given the initial voltage in a capacitor C is $V_C(0) = 5\text{V}$, $R=10\text{ K}\Omega$ and $C=1\ \mu\text{F}$. For the network shown in the figure, the value of $V_C(t)$ at time $t=\infty$ is:

For the two-port network shown in figure, The voltages and currents are given by a relation $V_1 = 2 I_1 + I_2$ and $V_2 = I_1 + I_2$. The admittance matrix $[Y]$ of this network is

The derivative of a parabolic function becomes

The devices which are used for the measurement of very high temperature are

A resistance potentiometer has a total resistance of $10000\ \Omega$ and is rated $4\text{ W}$. If the range of the potentiometer is $0$ to $100\text{ mm}$, then its sensitivity in $\text{V/mm}$ is:

Thermoelectric cooler works on the principle of

A Pirani gauge measures vacuum pressure and works on the principle of

A resistance potentiometer is:

The minimum value of input which is necessary to cause a detectable change from zero output is called:

A strain gauge has a nominal resistance of $600\ \Omega$ and a gauge factor of 2.5. The strain gauge is connected in a DC bridge with three other resistances of $600\ \Omega$ each. The bridge is excited by a $4\text{ V}$ battery. If the strain gauge is subjected to a strain of $1\ \mu\text{m/m}$, the magnitude of the bridge output will be}

Which of the following statement is incorrect in a series-series feedback?

A thermistor has a resistance of $10\text{ k}\Omega$ at $25^\circ\text{C}$ and $1\text{ k}\Omega$ at $100^\circ\text{C}$. The range of operation of is $0^\circ\text{C}$ to $150^\circ\text{C}$. The excitation voltage is $5\text{V}$ and a series resistance of $1\text{ k}\Omega$ is connected to the thermistor. The power dissipated in the thermistor is}

The capacitance, in force-current analogy, is analogous to

The gain margin of a system can be determined from the gain at

Phase margin of a system is used to specify which of the following?

For overdamped systems, the closed loop poles are

The avalanche breakdown voltage of a p-n junction:

For a negative feedback amplifier as shown in the figure, the type of feedback present in the circuit is

In a common emitter amplifier, which one of the following statement is TRUE?

A voltage follower is as shown in figure. Given that the open loop gain of an op-amp (A = 99), then what is the value of the output voltage $V_o$. Assume that the op-amp is ideal except that it is having a finite open loop gain.

Which of the following statements is true with respect to effective mass of an electron in a semiconductor lattice?