29/03/2020Electric Fields and Capacitance(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Electric Fields and Capacitance(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Capacitance and charged on plates are always equal directly related inversely related not related at all2. Particles involved in the movement within a material are neutrons protons electrons positrons3. The value of Capacitor depend on Only on Plate area, Distance between plate All of the above Only on Distance between plate and dielectric Plate area, Distance between plate and dielectric4. An electron with a speed of 3.00 x 106m/s moves into a uniform electric field of magnitude 1.00 x 10³ N/C. The field lines are parallel to the electron's velocity and pointing in the same direction as the velocity. How far does the electron travel before it is bought to rest 4.24 m 3.34 m 2.56 cm 5.12 cm5. When each plate of a capacitor stores a charges of 40 micro Coulomb, the potential difference across the plate is 8 Volt. Find the Capacitance of the capacitor. 20 micro Farad 15 micro Farad 5 micro Farad 10 micro Farad6. When drawing field lines, the lines should always cross. False True7. Fields that act on object with masses are gravitational fields force fields electric field magnetic field8. Suppose that a capacitor, rated at 330 pF, shows an actual value of 317 pF. By how many percent does its actual capacitance differ from its rated capacitance? −4.1% −0.041% −3.9% −0.039%9. A 5 µF capacitor is charged until the potential difference is 12 V before it is disconnected from the supply. The capacitor is then connected in parallel across an uncharged 10 µF capacitor. The common potential difference of the two capacitors is 4 V 9 V 12 V 6 V10. What is the ratio between the gravitational force: electrostatic force between 2 electrons? 1:1 1: 10^10 1: 10^20 1: 10^4011. Two equal charges are separated by a distance d. A third charge placed on a perpendicular bisector at x distance from the centre will experience maximum coulomb force,when x = (d/2√2) x = (d/√2) X = (d/2) X = (d/2√3)12. A charge of -4.00 nC is located at (0, 1.00) m. What is the x-component of the electric field at (4.00, -2.00) m? 0.863 -1.15 -2.24 3.9113. Charge Q is divided into two parts which are then kept some distance apart. The force b/w them will be maximum if the two parts are None of these Q/4 & 3Q/4 Q/2 each Q/3 & 2Q/314. Which of the following capacitance ranges is most typical of an air-variable capacitor? 1 µF to 100 µF 1 pF to 100 pF 0.001 pF to 0.1 pF 0.01 µF to 1 µF15. The picture shows the symbol of Non of the above Variable Capacitor Polarized Capacitor Non Polarized Capacitor16. The parts of a Capacitor are Metal Plates and Charges Metal Plates and Dielectric All of the above One Dielectric and two metal plates17. Energy stored in a 2000 mF capacitor charged to a potential difference of 10 V is 0.10 J 0.12 J 1.3 J 3 J18. Where an electric charge experiences a force, there is an magnetic field conventional current electric current electric field19. What happens when a charged insulator is placed near an uncharged metallic object? Attract Repel Exert no electrostatic force Charge insulator always spontaneously discharges20. A material with a high dielectric constant Acts to increase capacitance per unit volume. Acts to decrease capacitance per unit volume. Has no effect on capacitance. Causes a capacitor to become polarized21. What happens when a charged insulator is placed near an uncharged metallic object? Attract Exert no electrostatic force Charge insulator always spontaneously discharges Repel22. Two electrons are the width of an atom apart. What is the electrostatic force between them? 10^-20 N 10^-12 N 10^-8 N 10^-16 N23. One micro Farad is equal .................... Farad 0.001 F O.1 F 0.0000001 F 0.00001 F24. Where are electric field lines equidistant and parallel? In the area between two parallel plates. Half way between two positive charges Half way between two negative charges At the edges of two parallel plates25. Electrons are... Unequal Neutral Negative Positive26 out of 25Time is Up!