GATE EC 2014 Question Paper (15-Feb-2014) (Shift 2)

In the h-parameter model of the 2-port network given is the figure shown, the value of h₂₂ (in S) is _______

In the figure shown, the capacitor is initially uncharged. Which one of the following expressions describes the current I(t) (in mA) for 𝑡 > 0?

In the magnetically coupled circuit shown in the figure, 56 % of the total flux emanating from one coil links the other coil. The value of the mutual inductance (in H) is ______

Assume electronic charge q = 1.6 × 10⁻¹⁹ C, kT/q = 25 mV and electron mobility μₙ = 1000 cm²/V-s. If the concentration gradient of electrons injected into a P-type silicon sample is 1 × 10²¹/cm⁴, the magnitude of electron diffusion current density (in A/cm²) is _________.

Consider an abrupt p-n junction act (T = 300 K) shown in the figure. The depletion region width Xₙ on the n-side of the junction is 0.2 μm and the permittivity of silicon (tₛᵢ) is 1.044 × 10⁻¹² F/cm.

At the junction, the approximate absolute value of the peak electric field (KV/cm) is ______