# What is the formula for resonance?

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What is the formula for resonance?

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The following formula is correct:  (A) Load factor=Average load for a period/ Peak load for the same period  (B) Load factor=Average load for a period x Peak load for the same period  (C) Load factor=Average load for a period + Peak load for the same period  (D) All of the above

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For a 2nd order feedback control system, the peak resonance magnitude should be Mp ≤ 1.15. Hence the damping ratio (δ) is  (a) 0.1 (d) 0.5 (c) 0.707 (d) 1

What is Mason's gain formula?

Define quality factor for parallel resonance and write its mathematical expression.

Time constant for RC circuit formula τ = RC Where, τ = time constant

Which of the following statements is incorrect? A) During parallel resonance impedance at resonance is minimum B) During parallel resonance current is magnified C) During series resonance current at resonance is maximum D) During series as well as parallel resonance, the power factor is unity

The formula to find I when the values of V and R are known is? A.I = VR B.I = R/V C.V = IR D.I = V/R

The following formula is correct:  (A) Diversity factor =1 / Coincidence Factor  (B) Diversity factor =1 x Coincidence Factor  (C) Diversity factor =1 - Coincidence Factor  (D) All of the above

The following formula is correct:  (A) Load factor=Average load for a period/ Peak load for the same period  (B) Load factor=Average load for a period x Peak load for the same period  (C) Load factor=Average load for a period + Peak load for the same period  (D) All of the above

Which of the following is true at resonance in LC circuits? A) The series impedance of the two elements is at a maximum and the parallel impedance is at minimum B) The series impedance of the two elements is at a maximum and the parallel impedance is also at maximum C) The series impedance of the two elements is at a minimum and the parallel impedance is also at minimum D) The series impedance of the two elements is at a minimum and the parallel impedance is at maximum

A network is said to be under resonance when the voltage and the current at the network input terminals are (A) in phase (B) out of phase (C) in phase quadrature (D) in phase, and have equal magnitudes

The purpose of a parallel circuit resonance is to magnify?

The power factor at resonance in R-L- C parallel circuit is?

Why a parallel resonant circuit is called Rejector circuit?

If a line is 100 % series compensated it may result into series resonance at power frequency of?

Consider the following statements with respect to a high Q, series RLC circuit under resonance 1. The voltage across R is equal to the applied voltage 2. The voltage across L and C are zero 3. The voltage across L and C are equal in magnitude 4. The voltage accross L and C are maximum Which of these statements are correct?

In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor  A) Is always zero B) Can never be greater than the input voltage C) Can be greater than the input voltage, however, it is 90° out of phase with the input voltage D) Can be greater than the input voltage, and is in phase with the input voltage

In parallel RLC resonance circuit at resonance the current will be  (1) Minimum (2) Maximum (3) Zero (4) Infinite

In a series RLC circuit at resonance, which of the following quantities attains maximum value ? (A) Current (B) Voltage (C) Power (D) None of the above

The formula ____ determines the number of electrons that can be accommodated in any level.