List of practice Questions

In the below circuit, the value of $V_1$ is:

When testing a coil having a resistance of $ 10\,\Omega $, resonance occurred when the oscillator frequency was $ 10\,\text{MHz} $ and the rotating capacitor was set at $ \dfrac{500}{2\pi}\,\text{pF} $. The effective value of the Q of the coil is:

The open-loop voltage gain of an amplifier is 240. The noise level in the output without feedback is 100 mV. If a negative feedback with $ \beta = \dfrac{1}{60} $ is used, the noise level in the output will be:

A differential amplifier has $ R_L = 10\,\text{k}\Omega $ (equal values in both collectors), $ h_{ie} = 1\,\text{k}\Omega $, $ R_e = 50\,\text{k}\Omega $, and $ h_{fe} = 100 $. The common-mode gain is given by:

The op-amp and the 1 mA current source in the circuit of figure are ideal. The output of the op-amp is:

When the switch $S_2$ is closed, the gain of the programmable gain amplifier shown in the following figure is:

For the op-amp circuit shown in the figure below, $V_o$ is:

If the op-amp in figure is ideal, the output voltage Vout will be equal to:

An op-amp has an offset voltage of 1 mV and is ideal in all other respects. If this op-amp is used in the circuit shown in figure below, the output voltage will be (select the nearest value):

Which of the following will be the best selection for the core of an LVDT?

The particular integral of the differential equation
\[ \frac{d^2y}{dx^2} - 6 \frac{dy}{dx} + 9y = e^{3x} \text{ is ............} \]

The value of the integral
\[ \int_C \frac{6z - 5}{z^2 + 4z + 5} \, dz, \text{where } C \text{ is the circle } |z| = 1, \text{ is ............} \]

The Newton-Raphson method is used to find the root of the equation
\[ f(x) = e^{-x} - x \] If the initial guess for the root is 0, then the estimate of the root after the first iteration is ............

A linear discrete-time system has the characteristic equation, $z^3 - 0.81z = 0$, the system is:

Kirchhoff's current law is valid for:

If $(a, b, c)$ is the unique solution of the system of linear equations
$x + y + z = 2, 2x + y - z = 3, 3x + 2y + z = 4$,
then $b^2 + c^2 = ........$

Which instrument has the manual Null balance operation?

Flapper nozzle is used in following controller?

The most common pneumatic signal standard for industrial process instruments is:

Cavitation in a control valve is caused by:

Photo conductive cells are made by:

A system defined by the difference equation $y(n) = x(-n)$ is:

Which of the following is the best method for determining the stability and transient response?

The internal resistance of armature should ideally be: