Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be______________?

Related Mcqs:

1. An uncharged conductor is placed near a charged conductor, then_____________?

   A. the uncharged conductor gets charged by conduction
   B. the uncharged conductor gets charged by induction and then attracted towards the charging body
   C. the uncharged conductor is attracted first and then charged by induction
   D. it remains as such

2. If a third equal and similar charge is placed between two equal and similar charges, then this third charge will_____________?

   A. move out of the field of influence of the two charges
   B. remain in stable equilibrium
   C. not be in equilibrium
   D. be in unstable equilibrium

3. The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as____________?

   A. pholoelectric effect
   B. chemical effect
   C. magnetic effect
   D. induction

4. The presence of an uncharged conductor near a charged one increases the__________?

   A. charge of the charged conductor
   B. capacity of the charged conductor
   C. potential of the charged conductor
   D. all of the above

5. capacitor is to have an energy content of 20J it must be placed across a potential difference of________________?

   A. 4 volts
   B. 9 volts
   C. 2 volts
   D. 1 vol

6. The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be______________?

   A. 400 N/C
   B. 600 N/C
   C. 800 N/C
   D. 1200 N/C

7. When the motor is at its maximum speed then back emf will be______________?

   A. Maximum
   B. Zero
   C. Intermediate values
   D. No back emf

8. What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?

   A. 2
   B. 7
   C. 3
   D. None of the above

9. A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?

   A. 5 kO
   B. 20 kO
   C. 100 kO
   D. 10 kO

10. If metallic conductor is charged negatively then its weight______________?

    A. Remains same
    B. First increases then decreases
    C. Decreases then increases
    D. Increases for a while