a) Reduces the effective resistance but increases the effective internal reactance. b) Increases the effective resistance but reduces the effective internal reactance c) Reduces the effective resistance and effective internal reactance d) Increases the effective resistance and effective internal reactance Ans: (b)
a) Reduce corona b) Balance line voltage drop c) Reduced skin effect d) Reduce line loss Ans: (b)
a) No change in line resistance b) Increases in line resistance c) Decreases in line resistance d) Decreases in line series reactance Ans: (b)
a) Line losses b) Capacitive effect c) Disturbance to nearby communication circuits d) Effect of surge voltages induced on the line Ans: (c)
a) Skin effect b) Ferranti effect c) Corona d) Lenz’s effect Ans: (a)
a) Increases the capacitance b) Increases the inductance c) Decreases the capacitance and increases the inductance d) Does not effect any of the line constants Ans: (a)
a) Supply frequency b) Self inductance of conductor c) High sensitivity of material in the centre d) Both (a) and (b) Ans: (d)
a) Decreases b) Increases c) Remains unaltered d) Becomes infinite Ans: (b)
a) Resistance and shunt conductance only b) Resistance and inductance only c) Resistance, inductance and capacitance only d) Resistance, inductance, capacitance and shunt conductance. Ans: (d)
a) Increases the capacitance b) Increases the inductance c) Decreases the capacitance d) Decreases the inductance Ans: (a)