Quiz

Q1. For a given load, the armature current of a synchronous motor will be minimum if the power factor is

Q2. Which of the following connections is best suited for 3-phase, 4-wire service?

Q3. If the % reactance upto the fault point is 20%, then the short circuit current will be

Q4. In _________, the Ministry of Power, government of India formally launched ECBC(Energy Conservation Building Codes) for its voluntary adoption in the country.

Q5. Which DC motor is generally preferred for cranes and hoists?

Q6. In a transformer the energy is conveyed from primary to secondary

Q7. ___________ directly converts temperature into voltage.

Q8. In which part of the transmission system do faults occur most frequently

Q9. The intrinsic carrier density is \(1.5 \times 10^{16}\: m^{-3}\). If the mobility of electron and hole are 0.12 and 0.04 \(m^2 V^{-1}s^{-1}\), Its conductivity is _______ \(\Omega^{-1}m^{-1}\).

Q10. Consider a long, two-wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and the distance between their centers is L meters. If this distance is doubled, the inductance per unit length