Top 250+ Solved Electromagnetic Field MCQ Questions Answer
Q. If three 10 uF capacitors are connected in parallel, the net capacitance is
a. 20 uF
b. 30 uE
c. 40 uF
d. 50 uF
Q. Which of the following is not a vector ?
a. Linear momentum
b. Angular momentum
c. Electric field
d. Electric potential
Q. 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
Q. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
a. varying voltage produces the charg¬ing and dicharging currents
b. of high peak value
c. charging current can flow
d. discharge current can flow
Q. Which of the following statements is correct ?
a. Air capacitors have a blackband to indicate the outside foil
b. Electrolytic capacitor must be con¬nected in the correct polarity
c. Ceramic capacitors must be con¬nected in the correct polarity
d. Mica capacitors are available in capacitance value of 1 to 10 pF
Q. "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
Q. Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them
a. all in series
b. all in parallel
c. two in parallel and third in series with this combination
d. two in series and third in parallel across this combination
Q. 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
Q. 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
Q. 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
Q. In a capacitor the electric charge is stored in
a. metal plates
b. dielectric
c. both (a) and (b)
d. none of the above