List of top Questions asked in CUET (PG)

Assuming \(V_{CEsat} = 0.2\) V and \(\beta = 50\), the minimum base current (\(I_{Bmin}\)) required to drive the transistor in the figure to saturation is
The following circuit employing pass transistor logic, all NMOS transistors are identical with a threshold voltage of 1 V. Ignoring the body-effect, the output voltages at P, Q and R are,
If fixed positive charges are present in the gate oxide of an n-channel enhancement type MOSFET, it will lead to
The early-effect in a BJT is caused by
Due to illumination by light, the electron and hole concentrations in a heavily doped N-type semiconductor increase by \(\Delta n\) and \(\Delta p\), respectively. If \(n_i\) is the intrinsic concentration, then
Under high electric fields, in a semiconductor with an increasing electric field,
Crossover distortion behavior is characteristic of
In a p-type Si sample, the hole concentration is \(2.25 \times 10^{15} \text{ cm}^{-3}\) and the intrinsic carrier concentration is \(1.5 \times 10^{10} \text{ cm}^{-3}\). The value of electron concentration will be
A periodic signal \(x(t)\) of period \(T_0\) is given by \( x(t) = \begin{cases} 1, & |t|<T_1 \\ 0, & T_1<|t|<\frac{T_0}{2} \end{cases} \). The dc component of \(x(t)\) is
In the figure shown below, the ideal switch has been open for a long time. If it is closed at \(t=0\), then the magnitude of the current (in mA) through the 4 k\(\Omega\) resistor at \(t=0+\) is
The convolution of \(x(-t)\) with impulse function \(\delta(-t - t_0)\) is equal to
A 1 kHz signal is flat-top sampled at the rate of 1800 samples/sec and the samples are applied to an ideal rectangular low pass filter with a cut-off frequency of 1100 Hz. Then the output of the filter contains:
For a real number \( n>1 \), \( \frac{1}{\log_2 n} + \frac{1}{\log_3 n} + \frac{1}{\log_4 n} = 1 \). The value of n is
For the two port network shown below, The impedances \( Z_{11}, Z_{12}, \) and \( Z_{22} \) (in \( \Omega \)) are A. \(6\Omega\), B. \(9\Omega\), C. \(24\Omega\). Choose the correct sequence of \(Z_{11}, Z_{12}, Z_{22}\) in answer from the options given below:
In the circuit shown below, the current through the inductor (in A) is
The nodal method of circuit analysis is based on
Consider the diode circuit shown below. The diode, D, obeys the current-voltage characteristic \(I_D = I_s(\exp(V_D/nV_T) - 1)\). The circuit is biased so that voltage \(V>0\) and current \(I<0\). If you had to design this circuit to transfer maximum power from the current source (\(I_1\)) to a resistive load (not shown) at the output, what values for R1 and R2 would you choose? A. Small \(R_1\), B. Large \(R_1\), C. Small \(R_2\), D. Large \(R_2\). Choose the correct answer from the options given below:
If the number of zeros is less than the number of poles, i.e. \( Z<P \), then the value of the transfer function becomes zero for \( s \to \infty \). Hence, some zeros are located at infinity and the order of such zeros will be:
In the ISFET pH measurement system, the voltage circuit has ........ impedance and the current circuit has ......... impedance.
.......... type of electrochemical detection measures the electric current associated with the electron transfer involved in redox processes whereas ............ type of electrochemical detection measures conductance or capacitance changes associated with changes in the overall ionic medium between the two electrodes.
Which of the following statements is incorrect about Light-addressable potentiometric sensors (LAPS)?
A quadratic function of two variables is given as \( f(x_1, x_2) = x_1^2 + 2x_2^2 + 3x_1 + 3x_2 + 1 \). The magnitude of maximum rate of change of the function at the point (1,1) is
For a given vector \( W^T = [1, 2, 3] \), the vector is normal to the plane defined by \( W^T \cdot X = 1 \).
In the given figure, the vectors u and v are related as \( Au = v \) by a transformation matrix A. The correct choice of matrix A is % Vector details u = (4,3), v = (5,0)
Let the probability density function of a random variable x be given as \( f(x) = ae^{-2|x|} \). The value of 'a' is