ESE 2022 EE Technical Quiz 11

For a signal u(sint); Fourier series is having

are three orthogonal vectors. Given and the vector is parallel to

A hollow metallic sphere of radius R is charged to a surface density of σ. The strength of the electric field inside the sphere at a radius r(<R) is

In digital voltmeter, during start of conversion, zero indication is displayed and is called auto zeroing. This is achieved by

Solution of  is , then the value of (a + b) is ___________.

Which of the following is pentavalent impurity?

The limiting error in the value of resistance, taking limiting error in current ±3% and for power ±2% is _________%.

A single-phase transformer has R(p.u.) = 0.4 p.u. and X(p.u.) = 0.6 p.u. At what power factor, the voltage regulation will be zero?

An amplifier with negative feedback has a voltage gain of 110. It is found that without feedback, an input signal of 55 mV is required to produce a particular output. Find A_v and β respectively of the amplifier when the input signal is 0.5 V to get the same output with feedback.