An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is______________?

Related Mcqs:

1. A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________?

   A. 32Ω B. 62Ω C. 50Ω D. 100Ω...

2. An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ?

   A. 10mH B. 12mH C. 16mH D. 20mH...

3. The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________?

   A. Zero B. 45° C. 90° D. 180°...

4. Why should a resistance be introduced in a circuit in series deliberately ?

   A. to increase current B. to decrease current C. to control current D. just to give a good look to circuit...

5. A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________?

   A. (R+2πfL) B. R+1/2πfL C. (R2+f2L2) D. (R2+4π2f2L2)...

6. An alternating current of the r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing a 10Ω resistor. The peak current is then ?

   A. 20A B. 20.66A C. 6.66A D. 5.66A...

7. If capacitance of L-C circuit is made four times then frequency of the circuit becomes___________________?

   A. Twice B. One half C. Four times D. None...

8. At resonance the value of the power factor in an L-C-R series circuit is_______________?

   A. Zero B. 2 C. 1 D. Not definite...

9. n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________?

   IA. V = VR+VL+VC B. V2 = VR2+VL2+VC2 C. V2 = VR2+(VL-VC)2 D. V2 = VL2+(VR-VC)2...

10. A fuse is placed in series with the circuit to protect against__________________?

    A. high power B. high voltage C. high current D. over heating...