Which of the following expression is correct for electric field strength___________?
A. E = D/E
B. E = D2/t
C. E = jtD
D. E= nD2
Month: December 2018
Which of the following statement is true __________?
Which of the following statement is true __________?
A. The current in the discharging capacitor grows linearly
B. The current in the dicharging capacitor grows exponentially
C. The current in the discharging capacitor decays exponentially
D. The current in the discharging capacitor decreases constantly
Which of the following materials has the highest value of dielectric constant___________?
Which of the following materials has the highest value of dielectric constant___________?
A. Glass
B. Vacuum
C. Ceramics
D. Oil
For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?
For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?
A. Distance between plates
B. Area of the plates
C. Nature of dielectric
D. Thickness of the plates
Which of the following capacitors will have the least variation ____________?
Which of the following capacitors will have the least variation ____________?
A. Paper capacitor
B. Ceramic capacitor
C. Silver plated mica capacitor
D. None of the above
In a capacitor the electric charge is stored in____________?
In a capacitor the electric charge is stored in____________?
A. metal plates
B. dielectric
C. both (A) and (B)
D. none of the above
“The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. The above statement is associated with____________?
“The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. The above statement is associated with____________?
A. Coulomb’s square law
B. Gauss’s law
C. Maxwell’s first law
D. Maxwell’s second law
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?
A. Voltage across the plates increases
B. voltage across the plates decreases
C. charge on the capacitor decreases
D. charge on the capacitor increases
Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?
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
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