Inductive Reactance
Trending Questions
 π6
 π3
 π2
 5π6
 tan−134
 tan−132
 tan−125
 tan−143
 r1+r2r2−r1
 r1r2r2−r1
 r2−r1
 r1+r2r1r2
 Zero
 2 V
 10 V
 4.8 V
 0.8A
 1.0A
 A√7A
 57A
 7A
 12.5A
 20A
 25A
An electric bulb is designed to consume 55 W when operated at 110 volts. It is connected to a 220 V, 50 Hz line through a choke coil in series. What should be the inductance of the coil for which the bulb gets correct voltage ?
 3.07 Ω, 6.0A
 50 Ω, 4.4A
 40.4 Ω, 5A
 11.4 Ω, 17.5A
 12Ω
 24Ω
 6Ω
 3Ω
What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Current
A
Voltage
V
Current
A
Voltage
V
0.2
3.94
3.0
59.2
0.4
7.87
4.0
78.8
0.6
11.8
5.0
98.6
0.8
15.7
6.0
118.5
1.0
19.7
7.0
138.2
2.0
39.4
8.0
158.0
Two electric bulbs whose resistances are in the ratio $1:3$ are connected in series, the power dissipated in them is in the ratio.
1:1
1:3
2:1
1:4
 1.0
 −1.0
 zero
 0.5
 π√3 H
 100 H
 √2π H
 √3π H
 4√7A
 1.0A
 47A
 0.8A
In the following circuit, the supply voltage is defined as: V(t) = 230 sin( 314t  π/6) and L = 2.2H. Determine the value of the current flowing through the coil.
1/3sin(314t  π /6)
1/3sin(314t  2π/3)
3sin(314t  2π/3)
1/3cos(314t  5π/6)
In a series CR circuit shown in figure, the applied voltage is 10 V and the voltage across capacitor is found to be 8 V. If the voltage across R and the phase difference between current and the applied voltage respectively be x and tan−1(y), then the value of 2xy is
 1:1
 3:2
 2.5:1
 2:1
 0.2 H
 0.55 H
 1 H
 1.5 H
 5 A
 0.5 A
 0.7 A
 7 A
 1√5
 1√3
 1√7
 1√11
 R/2
 R/4
 R
 None of these
 a
 b
 c
 d