Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?
A. 50
B. 100
C. 150
D. 200
Electrostatics
Which of the following statements is correct ___________?
Which of the following statements is correct ___________?
A. Air capacitors have a black band to indicate the outside foil
B. Electrolytic capacitor must be connected in the correct polarity
C. Ceramic capacitors must be connected in the correct polarity
D. Mica capacitors are available in capacitance value of 1 to 10 pF
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because__________________?
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because__________________?
A. varying voltage produces the charging and dicharging currents
B. of high peak value
C. charging current can flow
D. discharge current can flow
A dielectric material must be____________?
A dielectric material must be____________?
A. resistor
B. insulator
C. good conductor
D. semi conductor
The capacitance of a capacitor is not affected by____________?
The capacitance of a capacitor is not affected by____________?
A. distance between plates
B. area of plates
C. thickness of plates
D. all of the above
The units of capacitance are____________?
The units of capacitance are____________?
A. volts/coulomb
B. coulombs/volt
C. ohms
D. henry/Wb
If three 10 uF capacitors are connected in parallel, the net cararitance is___________?
If three 10 uF capacitors are connected in parallel, the net cararitance is___________?
A. 20 uF
B. 30 uE
C. 40 uF
D. 50 uF
An electrolytic capacitor can be used for_____________?
An electrolytic capacitor can be used for_____________?
A. D.C. only
B. AC. only
C. both D.C. as well as A.C.
Which of the following is not a vector ___________?
Which of the following is not a vector ___________?
A. Linear momentum
B. Angular momentum
C. Electric field
D. Electric potential
The lines of force due to charged particles are_________?
The lines of force due to charged particles are_________?
A. always straight
B. always curved
C. sometimes curved
D. none of the above