Q. The function of a choke in a fluorescent lamp is

View solution

Q. A series resonant circuit is fed by a voltage having rms value V. At resonance, the voltage across inductance VL and voltage across capacitance VC are related as

View solution

Q. In a series RLC circuit, R = 2 kΩ, L = 1H and C = µf/400. The resonant frequency is

View solution

Q. Assertion (A): Millman's theorem helps in replacing a number of current sources in parallel by a single current source.

Reason (R): Maximum power transfer theorem is applicable only for dc, circuits.

View solution

Q. Double integration of unit step function leads to

View solution

Q. A conductor has a cylindrical shape with a diameter d. Its resistance is 2 Ω. It is recast into a cylindrical conductor of diameter 0.3d. The resistance of new conductor is likely to be

View solution

Q. A constant k low pass T section filter has a characteristic impedance of 600 p at zero frequency. At f = fc the characteristic impedance is

View solution

Q. Bus bars are always meant for very heavy currents.

View solution

Q. A low-pass filter frequency responce H (jω) = A (ω) e^(jΦ) (ω) does not produce any phase distortion, if

View solution

Q. In a tungsten filament lamp

View solution

Q. An RLC series circuit has R = 8 Ω, XL = 8 Ω and XC = 8 Ω Its impedance is

View solution

Q. Two similar mutually coupled coils have a total inductance of 900 mH and coefficient of coupling 0.5. The self inductance of each coils is

View solution

Q. For a high pass filter attenuation = 0 at f = 0.

View solution

Q. Two voltages are v1= 100 sin (ωt + 15°) and v2 = 60 cosωt, then

View solution

Q. If A = 16 ∠64°, (A)^0.5 is

View solution

Q. One commercial unit of energy is equal to

View solution

Q. Two coupled coils with self inductances of 4 mH and 16 mH are connected in series. The maximum possible value of inductance can be

View solution

Q. In using KCL it is necessary that current leaving a node is written as negative.

View solution

Q. A resistor is rated at 0.75 watt, 1 kΩ. Its current rating is

View solution

Q. If Z(s) has a pole at origin, the realization leads to

View solution