Home
Class 12
PHYSICS
A storage capacitor on a RAM chip has a ...

A storage capacitor on a RAM chip has a capacity 48fF. If the capacitor is charged to a potential of 4.6V, how many excess electrons are on its negative plate?

Text Solution

Verified by Experts

Data supplied, `C=48fF=48 xx 10^(-15)F`
`V=4.6V`
`e=1.6 xx 10^(-19)C`
`q=ne and q=CV " "n=(CV)/e=(48 xx 10^(-15)xx 4.6)/(1.6 xx 10^(-19))=(48 xx 46 xx 10^(4))/(16)`
`n=1.38 xx 10^(6)"electrons"`
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NEW JOYTHI PUBLICATION|Exercise Solution To Exercises From Ncert Texation|36 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NEW JOYTHI PUBLICATION|Exercise Practice Problems For Self Assessment|23 Videos

  • ELECTROMAGNETIC WAVES

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|16 Videos

  • MAGNETISM AND MATTER

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|13 Videos

Similar Questions

Explore conceptually related problems

A parallel-plate capacitor has plates of unequal area . The larger plates is connected to the positive terminal of the battery and the smaller plate to its nagative terminal. Let Q+ and Q-be the charges appearing on the positive and negative plates respectively

A capacitor having a capacitance of 100muF is charged to a potential difference of 24V . The charging battery is disconnected and the capacitor is connected to another battery of emf 12V with the positive plate of the capacitor joined with the positive terminal of the battery . (a ) Find the charges on the capacitor before and after the reconnection . (b ) Find the charge flown through the 12V battery . (c ) Is work done by the battery or is it done on the battery ? find its magnitude . (d ) Find the decrease in electrostatic field energy . (e ) Find the best developed during the flow of charge after reconnection.

The plates of a parallel plate capacitor have an area of 90 cm^(2) each and are separated by 2.5mm. The capacitor is charged by connecting it to a 400V supply. a. How much electrostatic energy is stored by the capacitor? b. View this energy as stored in hte electrostatic field between the plates, and obtain the energy per unit volume u. Hence arrive at a relation between u and the magnitude of electric field E between the plates.

A parallel - plate capacitor of plate area A and plate separation d is charged to a potential difference V and then the battery is disconnected . A slab of dielectric constant K is then inserted between the plate of the capacitor so as to fill the space between the plate .Find the work done on the system in the process of inserting the slab.

A capacitor having a capacitance of 100 mu f is changed to a potential difference of 50V. (a) What is the magnitude of the charge on each plate? (b)The charging battery is disconnected and a dielectric of dielectric constant 2.5 is inserted . Calculate the new potential difference between the plate .

two capacitors of capacity 200 pF and 600 pF are connected in parallel and then charged to a potential of 120 V. Determine (a) the charge on each capacitor, (b) the total charge on each cpacitor and (c) the effective capacity of the combination.

A capacitor of capacitor 5.00 muF is charged to 24.0 V and another capacitor of capacitance 6.0muF is charged to 12.0V (a) Find the energy stored in each capacitor .(b)The positive plates of the first capacitor is now connected to the negative plate of the second and vice versa . Find the new charges on the capacitors .(c)Find the loss of electrostatic energy during the process .(d)Where does this energy go?

A parallel plate capacitor of capacitnace C is charge to a potential V. It is connected to another uncharged capactior having the same capacitance find the ratio of the energy stored in the constance to that stored initially in the single capacitor.

A capacitor of capacitor of capacitance 2.0muF is charge to a potential diffrence of 12V It is then connected of uncharged capacitor of capacitance 4.0muF as shown in figure . Find (a ) the charge on each of the two capacitors after the connection, (b ) the electrostatic energy stored in each of the two capacitors.

An electron is emitted with negligible speed from the nagative plate of a parallel plate capacitor charged ot a potential difference V. The separtion between the plates is d and a magnetic field B exists in the space as shown in . Show that the electron will fail to strike the upper plate if ltdgt ((2m_e V)/(eB_0^2))^(1/2) .

NEW JOYTHI PUBLICATION-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Competitive Exam Corner
  1. A storage capacitor on a RAM chip has a capacity 48fF. If the capacito...

    Text Solution

    |

  2. From the figure find x and y.

    Text Solution

    |

  3. Two point charges +5muC and -2 muC are kept at a distance of 1m in fre...

    Text Solution

    |

  4. The equivalent capacitance betweeen A and B is ("in "muF)

    Text Solution

    |

  5. Identify the false statement.

    Text Solution

    |

  6. Two conducting spheres of radii 3 cm and 1 cm are separated by a dista...

    Text Solution

    |

  7. The work done in carrying a charge 'a' once round a circle of radius '...

    Text Solution

    |

  8. A parallel plate capacitor is charged to a potential difference of V v...

    Text Solution

    |

  9. Two particles A and B having equal charges +6 C, after being accelerat...

    Text Solution

    |

  10. Two identical thin rings, each of radius 10 cm carrying charges 10 C a...

    Text Solution

    |

  11. The electric potential V at any point (x, y, z) in space is given by V...

    Text Solution

    |

  12. Choose the correct statement.

    Text Solution

    |

  13. In a parallel plate capacitor, if the intervening medium of permittivi...

    Text Solution

    |

  14. The percentage error in measuring resistance with a metre bridge can b...

    Text Solution

    |

  15. An uncharged parallel plate capacitor filled with a dielectric of diel...

    Text Solution

    |

  16. Choose the wrong statement about equipotential surfaces.

    Text Solution

    |

  17. Three capacitors connected in series have an effective capacitance of ...

    Text Solution

    |

  18. A soap bubble is charged to a potential 12 V. If its radius is doubled...

    Text Solution

    |

  19. The energy stored in a capacitor of capacitance Chaving a charge Q und...

    Text Solution

    |

  20. A point charge of 2 C experiences a constant force of 1000 N when move...

    Text Solution

    |

  21. A charge Q is distributed over two concentric hollow spheres of radii ...

    Text Solution

    |