a) 2,000 lines per cm2 b) 2,000 lines per cm2 c) 2,000 kilolines per cm2 d) 400,000 lines per cm2 Ans: (b)
a) M.m.f. corresponds to current b) Gilbert corresponds to volt c) Reluctance corresponds to ampere d) Gauss corresponds to ohm Ans: (b)
a) 0 volt b) 10 volts c) 4 volts d) 5 volts e) 3.33 volts Ans: (e)
a) Zero and ideally infinity zero input impedance respectively b) Ideally infinite and zero input impedances respectively c) High and low input impedances respectively d) None of the above Ans: (a)
a) Imax/2 b) Imax/√2 c) Imax d) Imax/√3 Ans: (a)
a) Electrodynamic ammeter b) Moving coil galvanometer c) Thermocouple type instrument d) Induction type instrument Ans: (c)
a) nE/R + r b) nE/R c) nE/r + n.r d) E/R + r Ans: (c)
a) Dielectric heating b) Induction heating c) Wood heating d) None of the above Ans: (b)
a) Decreases the capacitance b) Increases the capacitance c) Provides the strength to the capacitor plates d) None of the above Ans: (b)
a) Generally uses the iron-vane type of a.c. movement b) Has a linear scale because it uses a.d.c. meter movement c) Has a none-linear scale crowded at the left because it uses the dynamometer type of meter movement d) Needs a thermocouple for low frequencies Ans: (b)