The resonant frequency of the given series circuit is

1.  1/2π√3 HZ

2.  1/4π√3 HZ

3.  1/4π√2 HZ

4.  1/π√2 HZ

4

1/4π√3 HZ

Explanation :
No Explanation available for this question

A network contains linear resistors and ideal voltage sources . If values of all the resistors are doubled , then the voltage across each resistor is

1.  halved

2.  doubled

3.   increased by 4 tomes

4.   not changed

4

not changed

Explanation :
No Explanation available for this question

The impedance seen by the source in the circuit in the figure is given by

1.  (0.54 + j0.313 ) ohms

2.  ( 4- j2 ) ohms

3.  (4.54 – j1.69 ) ohms

4.  ( 4+ j2 ) ohms

4

(4.54 – j1.69 ) ohms

Explanation :
No Explanation available for this question

Current I1 , I2 and I3 meet at a junction ( node ) in a circuit . All currents are marked as entering the node.If I1= -6 sin (ωt ) mA and I2 = 8 cos (ωt) mA ,then I3 will be

1.  10 cos (ωt + 36.87) mA

2.  14 cos (ωt + 36.87 ) mA

3.  - 14 sin (ωt + 36.87) mA

4.  10 cos (ωt + 36.87) mA

4

10 cos (ωt + 36.87) mA

Explanation :
No Explanation available for this question

In the circuit shown below , if the current through the resistor R is zero , what is the value of I

1.  1 A

2.  2 A

3.  3 A

4.  4 A

4

4 A

Explanation :
No Explanation available for this question

Two incandescent light bulbs of 40 W and 60 W rating are connected in series across the mains .Then

1.  the bulbs together consume 100 W

2.  the bulbs together consume 50 W

3.  the 60 W bulb glows brighter

4.  the 40 W bulb glows brighter

4

the 40 W bulb glows brighter

Explanation :
No Explanation available for this question

In the circuit of the given figure , the magnitudes of VL and VC are twice that of VR . The inductance of the coil is

1.  2.14 mH

2.  5.30 H

3.  31.4 mH

4.  1.32 H

4

31.4 mH

Explanation :
No Explanation available for this question

An initially relaxed RC – series network with R = 2 MΩ and C = 1 μF is switched on to a 10 V step input .The voltage across the capacitor after 2 seconds will be

1.  zero

2.  3.68 V

3.  6.32 V

4.  10 V

4

6.32 V

Explanation :
No Explanation available for this question

The phasor current through the inductance in the given circuit shown in

1.  10/√2< -450

2.  10/√2< 450

3.  5 < 450

4.  5 < - 450

4

10/√2< -450

Explanation :
No Explanation available for this question

1.  130 mH

2.  63 mH

3.  32 mH

4.  3969 mH

4