ESE Prelims 2022 Achievers Quiz 7

The transfer function for a system with input, r(t) = 1 + e^–3t and response c(t) = e^–2t is:

An isolated sphere has a capacitance of 50 pf. If its potential is raised to 10⁴ volts, radius and charge will be respectively. Given that m.

A common base transistor amplifier has an input resistance of and output resistance of. If a signal of is applied between emitter and base, voltage amplification is___

(Assume)

Consider two successive code words of a linear block code (7, 4) given by

C1: 0000110

C2: 1000101

The hamming distance between the two code words is_____

A graded index optical fiber cable has a core with parabolic profile and diameter of. It has and the wavelength of light ray propagating down the fiber is. Determine the total number of modes possible in this case.

A small cut is made in a permanent magnet of toroidal shape. Which of the following are true for, if is the magnetic field in the air gap and is that inside the magnet?

1.

2.

3.  is in same direction as

4.  and are in opposite direction

In a BJT switching circuit, supply voltage is V_CC = 9 V, biasing resistors are R_B = 15 kΩ, R_C = 6.8 kΩ and the transistor has an h_FE value of 25. What is the minimum input voltage required to switch the transistor into saturation when V_CE = 0.2 V?

Calculate the critical current which can flow through a long thin superconducting wire of diameter. The critical magnetic field is given as