Top Electrical Engineering MCQ on Simple DC Networks

1 - In a series circuit, which of the parameters remain constant across all circuit elements such as resistor, capacitor and inductor etcetera?a) Voltageb) Currentc) Both voltage and currentd) Neither voltage nor current.Answer: b2 - If there are two bulbs connected in series and one blows out, what happens to the other bulb?a) The other bulb continues to glow with the same brightnessb) The other bulb stops glowingc) The other bulb glows with increased brightnessd) The other bulb also burns outAnswer: b3 - Voltage across a series resistor circuit is proportional to?a) The amount of time the circuit was on forb) The value of the resistance itselfc) The value of the other resistances in the circuitd) The power in the circuitAnswer: b4 - Many resistors connected in series will?a) Divide the voltage proportionally among all the resistorsb) Divide the current proportionallyc) Increase the source voltage in proportion to the values of the resistorsd) Reduce the power to zeroAnswer: a5 - What happens to the current in the series circuit if the resistance is doubled?a) It becomes half its original valueb) It becomes double its original valuec) It becomes zerod) It becomes infinityAnswer: aAlso Read - MCQ on Control System for Electrical Engineering 6 - If two bulbs are connected in parallel and one bulb blows out, what happens to the other bulb?a) The other bulb blows out as wellb) The other bulb continues to glow with the same brightnessc) The other bulb glows with increased brightnessd) The other bulb stops glowingAnswer: b7 - The current in each branch of a parallel circuit is proportional to_______a) The amount of time the circuit is on forb) Proportional to the value of the resistorsc) Equal in all branchesd) Proportional to the power in the circuitAnswer: b8 - The currents in the three branches of a parallel circuit are 3A, 4A and 5A. What is the current leaving it?a) 0Ab) Insufficient data providedc) The largest one among the three valuesd) 12AAnswer: d9 - Batteries are generally connected in______a) Seriesb) Parallelc) Either series or paralleld) Neither series nor parallelAnswer: a10 - What is the value of current if a 50C charge flows in a conductor over a period of 5 seconds?a) 5Ab) 10Ac) 15Ad) 20AAnswer: b11 - KCL can be applied for __________a) Planar networksb) Non-planar networksc) Both planar and non-planard) Neither planar nor non-planarAnswer: c12 - KVL is applied in ____________a) Mesh analysisb) Nodal analysisc) Both mesh and nodald) Neither mesh nor nodalAnswer: a13 - A 250V bulb passes a current of 0.3A. Calculate the power in the lamp.a) 75Wb) 50Wc) 25Wd) 90WAnswer: a14 - Kilowatt-hour(kWh) is a unit of?a) Currentb) Powerc) Energyd) ResistanceAnswer: c15 - Calculate the work done in a resistor of 20 ohm carrying 5A of current in 3 hours.a) 1.5Jb) 15Jc) 1.5kWhd) 15kWhAnswer: c16 - The SI unit of power is?a) kW(kilo-watt)b) J/s(joules per second)c) Ws(watt-second)d) J/h(joules per hourAnswer: b17 - Out of the following, which one is not a source of electrical energy?a) Solar cellb) Batteryc) Potentiometerd) GeneratorAnswer: c18 - A battery converts___________a) Electrical energy to chemical energyb) Chemical energy to electrical energyc) Mechanical energy to electrical energyd) Chemical energy to mechanical energyAnswer: b19 - A wire of length 2m and another wire of length 5m are made up of the same material and have the same area of cross section, which wire has higher resistance?a) Both have equal resistanceb) The 2m wire has higher resistancec) The 5m wire has higher resistanced) The value of resistance cannot be determined from the given dataAnswer: c20 - Which, among the following is a unit for resistivity?a) ohm/metreb) ohm/metre2c) ohm-metred) ohm-metre2Answer: c21 - The reciprocal of resistivity is________a) Conductanceb) Resistancec) Conductivityd) ImpedanceAnswer: c22 - The resistance of pure metals ___________a) Increases with increase in temperatureb) Decreases with increase in temperaturec) Remains the same with increase in temperatured) Becomes zero with increase in temperatureAnswer: a23 - The temperature of a coil cannot be measured by which of the following methods?a) Thermometerb) Increase in resistance of the coilc) Thermo-junctions embedded in the coild) CaloriemeterAnswer: d24 - Materials having resistance almost equal to zero is_______a) Semi-conductorb) Conductorc) Superconductorsd) InsulatorsAnswer: c