List of top Electronics Questions asked in GATE PH

Let \( p(\bar{p}, \bar{q}, t) \) be the phase space density of an ensemble of a system. The Hamiltonian of the system is \( H(p, q) \). If \( \{A, B\} \) denotes the Poisson bracket of \( A \) and \( B \), then \( \frac{dp}{dt} = 0 \) implies

Consider the operational amplifier circuit shown in figure.

The output voltage V。 is ____ V (in integer).

In a parallel plate capacitor, the plate at \( x = 0 \) is grounded and the plate at \( x = d \) is maintained at a potential \( V_0 \). The space between the two plates is filled with a linear dielectric of permittivity \( \epsilon = \epsilon_0 \left(1 + \frac{x}{d}\right) \), where \( \epsilon_0 \) is the permittivity of free space. Neglecting the edge effects, the electric field (\(\vec{E}\)) inside the capacitor is .

The vapor pressure (P) of solid ammonia is given by \( \ln(P) = 23.03 - \frac{3754}{T} \), while that of liquid ammonia is given by \( \ln(P) = 19.49 - \frac{3063}{T} \), where \( T \) is the temperature in K. The temperature of the triple point of ammonia is ________ K (rounded off to two decimal places).

The minimum number of basic logic gates required to realize the Boolean expression \( B \cdot (A + B) + A \cdot (B + A) \) is ____ (in integer).

The temperature dependence of the electrical conductivity (σ) of three intrinsic semiconductors A, B and C is shown in figure

Let \(E_A, E_B\) and \(E_C\) be the bandgaps of A, B and C, respectively. Which one of the following relations is correct?

Let \(N_e\) and \(T_e\), respectively, denote number and kinetic energy of electrons produced in a nuclear beta decay. Which one of the following distributions is correct? 

Consider the following circuit:

Suppose the input signal P is

and the input signal Q is 

Which one of the following output signals is correct?

The symbols C, D, \( V_{in} \), and \( V_{o} \) shown in the figure denote capacitor, ideal diode, input voltage, and output voltage, respectively.

Which one of the following output waveforms (\( V_{o} \)) is correct for the given input waveform (\( V_{in} \))?