CBSE
In an AC circuit, voltage V = V0sinωt and inductor L is connected across the circuit. Then the instantaneous power will be
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
In an electrical containing L, C and R which of the following does not denote the dimensions and frequency?
LC
Reciprocal of impedance is
susceptance
conductance
admittance
transconductance
What is the mechanical equivalent of spring constant kin LC oscillating circuit?
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)
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
If frequency of R-L circuit is f then impedance will be
R2 + ( 2f2 )2
R2 + (2f )2
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 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