PHY 102 Pre Test 0% 0 Created by Oladeji Timilehin Daramola PHY 102 NOTE: The quiz is meant for revision purpose only! Join the 100 level group to access other quiz CLICK TO JOIN 1 / 20 If the sheet of a bakelite is inserted between the plates of an air capacitor,the capacitance will Decrease Increase Remains unchanged Becomes Zero 2 / 20 One volt is the same as one joule/coulomb one coulomb/joule one coulomb one joule 3 / 20 The total electric flux through any closed surface surrounding charges is equal to the amount of charge enclosed". The above statement is associated with Coulomb's square law Gauss's law Maxwell's second law 4 / 20 Paper condenser is usually of fixed value always polarised a variable condenser electrolytic condenser 5 / 20 In a cable capacitor,voltage gradient is maximum at the surface of the earth conduction sheath insulator 6 / 20 Dielectric strength of a material depends on moisture content temperature all of the above thickness content 7 / 20 The presence of an uncharged conductor near a charged one increases the All of the above potential of the charged conductor capacity of the charged conductor charge of the charged conductor 8 / 20 Which of the following statements is incorrect ? The leakage resistance of ceramic capacitors is generally high The stored energy in a capacitor decreases with reduction in value of capacitance The stored energy in a capacitor increases with applied voltage A wire cable has distributed capacitance between the conductors 9 / 20 Paper condenser is usually of fixed value always polarised a variable condenser electrolytic condenser 10 / 20 If three 15 uF capacitors are connected in series,the net capacitance is 5 uF 4.5 uF 50 uF 30 uF 11 / 20 A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is 0.024 F 0.02 F 0.12 F 0.8 F 12 / 20 Which of the following expressions correct for electric field strength? E = D/E E = D2/t E = jtD E= nD2 13 / 20 The electric field at a point situated at a distance d from straight charged conductor is proportional to inversely proportional to d inverse to d None of the above 14 / 20 Which of the following capacitors has relatively shorter shelf life ? Mica capacitor Electrolytic capacitor Ceramic capacitor Paper capacitor 15 / 20 An uncharged conductor is placed near a charged conductor, then it remains as such the uncharged conductor is attracted first and then charged by induction the uncharged conductor gets charged by induction and then attracted towards the charging body the uncharged conductor gets charged by conduction 16 / 20 is that property of a capacitor which delays any change of voltage across it. Inductance Capacitance Potential gradient None of the above 17 / 20 If a third equal and similar charge is placed between two equal and similar charges, then this third charge will move out of the field of influence of the two charges remain in stable equilibrium not be in equilibrium be in unstable equilibrium 18 / 20 "The total electric flux through any closed surface surrounding charges is equal to the amount of charge enclosed". The above statement is associated with: Coulomb's square law Gauss's law Maxwell's second law Maxwell's first law 19 / 20 Ceramic capacitors must be connected incorrect polarity Electrolytic capacitors must be connected incorrect polarity Air capacitors have a black band to indicate the outside foil Mica capacitors are available in capacitance values of 5 to 20 uF 20 / 20 A single core cable used on 33000V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is 62 x105 V/m 72 x105 V/m 82 x105 V/m 92 x105 V/m Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Send feedback Like this:Like Loading...
