Advertisements
Advertisements
प्रश्न
The potential difference across the resistor is 160 V and that across the inductor is 120 V. Find the effective value of the applied voltage. If the effective current in the circuit is 1⋅0 A, calculate the total impedance of the circuit.
Advertisements
उत्तर
We have,
VR = 160 V
VL = 120 V
`"V"_"net" = sqrt((160)^2 + (120)^2)`
` = 10 sqrt(256 + 144)`
` = 10 sqrt400`
` = 10 xx 20 "V"`
Vnet = 200 V
Inet = 1 A
`"Z" = "V"/"I" = 200 Ω`
APPEARS IN
संबंधित प्रश्न
Reactance of a coil is 157 Ω. On connecting the coil across a source of frequency 100 Hz, the current lags behind e.m.f. by 45°. The inductance of the coil is ...........
(a) 0·25 H
(b) 0·5 H
(c) 4 H
(d) 314H
Draw a graph to show variation of capacitive-reactance with frequency in an a.c. circuit.
A light bulb and a solenoid are connected in series across an ac source of voltage. Explain, how the glow of the light bulb will be affected when an iron rod is inserted in the solenoid.
A light bulb is rated at 120 W for a 220 V a.c. supply. Calculate the resistance of the bulb.
A light bulb is rated at 125 W for a 250 V a.c. supply. Calculate the resistance of the bulb.
What is the reactance of a capacitor connected to a constant DC source?
An AC source is connected to a capacitor. Will the rms current increase, decrease or remain constant if a dielectric slab is inserted into the capacitor?
Which of the following plots may represent the reactance of a series LC combination?
In a pure capacitive circuit if the frequency of ac source is doubled, then its capacitive reactance will be ______.
