ELECTRICIAN- Basic Electrical Practice MCQ

Prepare for your examinations with a set of multiple choice questions (MCQs) related to Basic Electrical Practice for Electrician Trade. The questions are likely designed to test a user’s knowledge or understanding of electrical concepts and may be useful for exam preparation or self-assessment. The website may be a helpful resource for individuals studying to become electricians or seeking to improve their understanding of electrical principles.

 

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BASIC ELECTRICAL PRACTICE

How many electrons are there in the third cell of the copper atom?8131829

Which is the semiconductor material?EurekaEboniteManganinGermanium

What is the indication of neon polarity indicator used for checking A.C. supply?Both electrodes will glowOnly one electrode will glowBoth electrodes will be flickeringOne electrode will glow and another will be flickering

Calculate the electrical energy in unit consumed by 500W lamp for 5 hours.0.5 unit1.0 unit1.5 unit2.5 unit

What is the value of hot resistance of a bulb rated as 100W/250V?31.25 ohm62.50 ohm312.50 ohm625.00 ohm

Which law states that in closed electric circuit, the applied voltage is equal to the sum of the voltage drops?Ohm’s lawLaws of resistanceKirchhoff’s first lawKirchhoff’s second law

Calculate the total power of the circuit of two lamps rated as 200W/240V are connected in series across 240V supply?50 W100 W200 W400 W

What is the reading of ohmmeter across opened ‘R2’ resistor?

Indicate zero readingIndicate infinite resistanceTotal resistance value of the circuitValue of sum of the resistance of R1 and R3 only |

What is the change of resistance value of the conductor as its diameter is doubled?Increases to two timesDecreases to four timesDecrease to half of the valueNo change in value of resistance

What is the name of the resistor?

Metal film resistorWire wound resistorCarbon film resistorCarbon composition resistor

Which material is having negative temperature co-efficient property?MicaEurekaCopperManganin

What electrical quantities are related in Ohm’s law?Current, resistance and powerCurrent, voltage and resistivityCurrent, voltage and resistanceVoltage, resistance and current density

What is the effect of the parallel circuit with one branch opened?Current will remain sameWhole circuit will not functionNo current will flow in that branchVoltage drop increase in the opened branch

What is the unit of resistivity?ohm / cmohm / cm2ohm - meterohm / meter

Which type of resistor is used for Arc quenching protection in circuit breakers?VaristorsSensistorsThermistorsLight dependent resistor

Which is the application of series circuit?Voltmeter connectionLighting circuits in homeShunt resistor in ammeterMultiplier resistor of a voltmeter

What is the effect on opened resistor in series circuit?No effect in opened resistorFull circuit current will flow in opened resistorTotal supply voltage will appear across the opened resistorNo voltage will appear across the opened resistor

What is the name of the resistor if its resistance value increase with increase in temperature?VaristorsSensistorsThermistorsLight dependent resistor

What is the formula for Quantity of electricity (Q)?Current x TimeVoltage x CurrentCurrent x ResistanceVoltage x Resistance

What is the unit of conductance?MhoOhmOhm-mOhm/m

Which one defines the change in resistance in Ohm(Ω) per degree centigrade (°C)?Temperature effectLaws of temperatureTemperature constantTemperature co-efficient

Which type of meter is used to test the polarity of battery?Moving iron ammeterMoving coil voltmeterMoving iron voltmeterDynamometer type wattmeter

Which is the application of series circuit?Fuse in circuitVoltmeter connectionElectrical lamp in homesShunt resistor in ammeter

Which method is used for measuring 1 Ohm to 100K Ohm range resistance?Substitution methodKelvin bridge methodWheat stone bridge methodVoltmeter and ammeter method

What is the S.I unit of specific resistance?Ohm/cmOhm/metre2Ohm-meterMicro ohm/cm2

Which electrical quantity affects the heat generated in a conductor?VoltageSquare of the currentSquare of the resistanceCurrent passed through it

What is the change in value of resistance of the conductor, if its cross section area is doubled?No changeDecreases 2 timesIncreases 2 timesDecreases 4 times

What is the resistance of Light Dependent Resistor (LDR), if the intensity of light is increased?IncreasesDecreasesRemains sameBecomes infinity

Which formula is used to calculate the power of a DC circuit?Voltage x timeCurrent x voltageCurrent x resistance

Voltage x resistance

What is the value of resistance in an open circuit?ZeroLowHighInfinity

What is the specific resistance value of copper conductor?1.72 Ohm/cm31.72 Micro ohm1.72 Micro ohm/cm31.72 Micro ohm/m

Which is inversely proportional to the resistance of a conductor?LengthResistivityTemperatureArea of cross section