CBSE
In given series LCR circuit R = 4Ω, XL = 5 Ω and XC = 8Ω, the current
Leads the voltage by tan-1(3/4).
Leads the voltage by tan-1(5/8)
Lags the voltage by tan-1(3/4)
Lags the voltage by tan-1(5/8)
Two sinusoidal waves of intensity I having same frequency and same amplitude interferes constructively at a point. The resultant intensity at a point will be
I
2I
4I
8I
In an electrical containing L, C and R which of the following does not denote the dimensions and frequency?
LC
Alternating current cannot be measured by D.C ammeter because
A.C cannot pass through D.C parameter
A.C changes direction
average value of current for complete cycle is zero
D.C ammeter will get changed
If frequency of R-L circuit is f then impedance will be
R2 + ( 2f2 )2
R2 + (2f )2
In a series LCR circuit, the voltage across the resistance, capacitance and inductance is 10 V each. If the capacitance is short circuited the voltage across the inductance will be
140 V
10 V
10/ V
20 V
What is the mechanical equivalent of spring constant kin LC oscillating circuit?
Which of the following parameter in the series LCR circuit is analogous to driving force F(t) in mechanics?
inductance L
capacitance C
voltage V0
In an AC circuit, voltage V = V0sinωt and inductor L is connected across the circuit. Then the instantaneous power will be
Reciprocal of impedance is
susceptance
conductance
admittance
transconductance