Q41. Which of the following line circuits uses 3 phase and 4 wire system?

Q42. The booster is inserted in the circuit to

Q43. In a 20 feet wide street road, the usual distance between two consecutive street light poles is

Q44. A lead sheath in the underground cable is provided

Q45. Identify the type of cable shown in the given figure.

Q46. The insulation resistance of cable length 1 km, single Core is \(10 \: M \Omega\), its resistance for 2 km length will be

Q47. Insulation resistance of a cable is proportional to the length, L or an exponent of L as follows:

Q48. In a cable of conductor diameter 'd' and overall diameter with dielectric material 'D', the maximum dielectric stress.

Q49. In capacitance grading of cable, the dielectric of highest permittivity is

Q50. In a test by Murray loop for ground fault on 600 m of cable having a resistance of \(1.5 \Omega/km\), the faulty cable is looped with a sound cable of the same length and area of cross section. If the ratio of the other two arms of the testing network at balance is 3 : 1, find the distance of the fault from the testing end of cables.