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 A single core cable used on33000 V 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 2 / 20 If an ohm meter reading immediately goes practically to zero and stays there, capacitor is charged short-circuited lossy satisfactory 3 / 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 4 / 20 The units of capacitance are; volts/coulomb coulombs/volt ohms henry/Wb 5 / 20 Which of the following capacitors has relatively shorter shelf life ? Mica capacitor Electrolytic capacitor Ceramic capacitor Paper capacitor 6 / 20 The direction of electric field due +0 positive charge is away fromthe charge towards the charge both(a) and (b) none of the above 7 / 20 1 volt/meter is same as 1 meter/coulomb 1 Newton meter 1 newton/meter 1 joule/coulomb 8 / 20 A dielectric material must be semiconductor good conductor insulator resistor 9 / 20 Which of the following expressions correct for electric field strength? E = D/E E = D2/t E = jtD E= nD2 10 / 20 Dielectric strength of a material depends on moisture content temperature all of the above thickness content 11 / 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 12 / 20 The ability of charged bodies to exert force on one another is attributed to the existence of electrons Proton Neutrons Electric field 13 / 20 The lines of force due to charged particles are always straight always curved sometimes curved none of the above 14 / 20 In a capacitor,the electric charge is stored in metal plates dielectric dielectric as well as metal plates none of the above 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 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 17 / 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 18 / 20 Paper condenser is usually of fixed value always polarised a variable condenser electrolytic condenser 19 / 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 20 / 20 A field line and a equipotential surface are always parallel always at 90° Inclined at any angle 0 none of the above Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Send feedback Like this:Like Loading...
