The time constant and R-C circuit may also be defined as the time during which the charging current falls to ________ percent of its initial maximum value
A. 37
B. 42
C. 63
D. 73
Electrostatics
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point ?
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point ?
A. Electric intensity
B. Magnetic flux density
C. Electric flux
D. None of the above
A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is____________?
A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is____________?
A. 62 x 105 V/m
B. 72 x 105 V/m
C. 82 x 105 V/m
D. 92 x 105 V/m
capacitors are used for audio frequency and radio frequency coupling and tuning ?
capacitors are used for audio frequency and radio frequency coupling and tuning ?
A. Air
B. Mica
C. Plastic film
D. Ceramic
The units of volume charge density are___________?
The units of volume charge density are___________?
A. Coulomb/meter
B. Coulomb/meter
C. Coulomb/meter
D. Coulomb/meter
Which of the following capacitors will have the least value of breakdown voltage________ ?
Which of the following capacitors will have the least value of breakdown voltage________ ?
A. Mica
B. Paper
C. Ceramic
D. Electrolytic
Which capacitor will be physically smaller for the same ratings ___________?
Which capacitor will be physically smaller for the same ratings ___________?
A. Ceramic capacitor
B. Paper capacitor
C. Both will be of equal size
D. None of the above
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?
A. Ceramic capacitor
B. Mica capacitor
C. Both will have identical value of capacitance
D. It depends on applied voltage
The capacity of capacitor bank used in power factor correction is expressed in terms of____________?
The capacity of capacitor bank used in power factor correction is expressed in terms of____________?
A. kW
B. kVA
C. kVAR
D. volts
The relative permittivity of free space is given by__________?
The relative permittivity of free space is given by__________?
A. 1
B. 10
C. 100
D. 1000