NLC Technical Quiz 9

An inductor of 4H is charged when switch is connected to ‘a’. At t = 0sec

switch is moved from ‘a’ to ‘b’. Calculate the instant at which current in the given circuit will be 36.9% of its initial value.

The value of alternating emf E in the given circuit will be

V_R = 80 V, V_L = 40 V and V_C = 100 V

An oscilloscope indicates ________ value of voltage.

Determine the bandwidth of a feedback amplifier. Consider a feedback amplifier with an open-loop low frequency gain of A = 10⁴, an open-loop bandwidth of ω_H = 2ϖ(100) rad/sec and a closed loop gain of 50 .

In Op-amp for minimum percentage error:

A signal x(t) = 5 + 2 cos (ω₀t) + 4 cos (2ω₀t) is Fourier transformed. The number of spectral lines in the Fourier transformed signal are:

MOSFET can be used as a

The binary equivalent of (0.625)₁₀ is

The equation of current in an AC circuit is I = 4 sin (100 πt + π/3). Root mean square value of the current is

In case of Induction motor & synchronous motor, the speed control is respectively