Which of the following statements is correct ___________?

Related Mcqs:

1. Which of the following statements is correct ?

   A. Mica capacitors are available in capacitance values of 5 to 20 uF
   B. Air capapitors have a black band to indicate the outside foil
   C. Electrolytic capacitors must be connected in correct polarity
   D. Ceramic capacitors must be connected in correct polarity

2. Which of the following statements is incorrect _________________?

   A. The leakage resistance of ceramic capacitors is generally high
   B. The stored energy in a capacitor decreases with reduction in value of capacitance
   C. The stored energy in a capacitor increases with applied voltage
   D. A wire cable has distributed capacitance between the conductors

3. Which of the following statements is incorrect ?

   A. The thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor .
   B. A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF
   C. Capacitors in series provide less capacitance but a higher voltage breakdown rating for the combination
   D. A capacitor can store charge because it has a dielectric between two conductors

4. 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

5. select the correct statement?

   A. the electric lines of force have no physical existence
   B. they expand laterally and contract longitudinally
   C. they do not cross each other and group together in dielectric
   D. all the above statements are true

6. Which of the following is not a vector ___________?

   A. Linear momentum
   B. Angular momentum
   C. Electric field
   D. Electric potential

7. Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?

   A. Aluminium foil capacitor
   B. Mica capacitor
   C. Ceramic capacitor
   D. Paper capacitor

8. The direction of electric field due +0 positive charge is ___________?

   A. away from the charge
   B. towards the charge
   C. both A. and (6)
   D. none of the above

9. 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

10. 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