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 The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value, 37 42 63 73 2 / 20 The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value. 37,initial 62,initial 62,final 37,final 3 / 20 A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is 150 joules 50 joules 200 joules 250 joules 4 / 20 1 volt/meter is same as 1 meter/coulomb 1 Newton meter 1 newton/meter 1 joule/coulomb 5 / 20 Which of the following capacitors will have the least variation? Paper capacitor Ceramic capacitor Silver plated mica capacitor None of the above 6 / 20 One volt is the same as one joule/coulomb one coulomb/joule one coulomb one joule 7 / 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 8 / 20 The units of capacitance are; volts/coulomb coulombs/volt ohms henry/Wb 9 / 20 If three 15 uF capacitors are connected in series,the net capacitance is 5 uF 4.5 uF 50 uF 30 uF 10 / 20 The value of E within the field due to a point charge can be found with the help of Faraday's laws Kirchhoff s laws Coulomb's laws none of the above 11 / 20 Paper condenser is usually of fixed value always polarised a variable condenser electrolytic condenser 12 / 20 Which of the following statements is correct? Air capacitors have a black band to indicate the outside foil Electrolytic capacitor must be connected in the correct polarity Ceramic capacitors must be connected in the correct polarity Mica capacitors are available in capacitance value of 1 to 10 pF 13 / 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 14 / 20 The force between two charges is 120 N. If the distance between the charges is doubled, the force will be 60 N 30 N 40 N 15 N 15 / 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 16 / 20 The dissipation factor a good dielectric is of the order of 0.0002 0.002 0.02 0.2 17 / 20 A potential of 400V is applied to a capacitor, the plates of which are 4mm apart. The strength of electric field is 10 kV/m 100 kV/m 2 kV/m 5 kV/m 18 / 20 The electric field intensityat a point situated 4 meters froma point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be 400 N/C 600 N/C 800 N/C 1200 N/C 19 / 20 The bridge used for the measurement of the value of the capacitance is ? Wien's bridge Wheatstone bridge Schering bridge Hay's bridge 20 / 20 Out of the following capacitors of identical rating which one will have the smallest dimensions ? Paper capacitor Ceramic capacitor Mica capacitor Aluminium foil capacitor Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Send feedback Like this:Like Loading...
