UP polytechnic Lecturer (EE) Quiz 39

Match List-I with List-II

Match List-I with List-II

Which of the following transfer function does not have negative real part for s = jω for all ω ∈ [0, ∞)?

A balanced delta-connected load (20 + j16) ohm /phase is connected to a 3-phase 230 V balanced supply. The line current and the real power drawn respectively are ___________.

A parallel-plate capacitor has plates of dimensions 2 cm by 3 cm, separated by a 1 mm thickness of paper with relative permittivity 3.7. Permittivity of free space, Find the capacitance.

What is the total electric flux through the surface of a sphere that has a radius of 1 m and carries a charge of 1 μC at its centre? Coulomb constant is given by ∈₀ is the permittivity of free space.

The charging reactance of 50 km length of the line is 1500 Ω. What will be the charging reactance for 100 km length of the line?

A factory draws 100 kW at 0.8 p.f. lagging from a 3-phase, 11 kV supply. It is desired to raise the p.f. to unity using capacitor bank. The total power rating of the capacitor bank is

Which of the statement given below is/are correct?

(a) BJT is a current controlled device with high input impedance and high gain bandwidth.

(b) UJT is a positive resistance device and used as oscillator.

(c) FET is a voltage-controlled device with high input impedance and gain bandwidth.

(d) BJT, FET, UJT can all be used for amplification

A semiconductor device made out of a material having very high temperature coefficient of resistance is:-