#### Basic Electrical Mcqs – (Electrical Engineering) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

**“** Basic Electrical Mcqs **“.** Tab this page to check **“Latest ** Basic Electrical **MCQs”** for the preparation of **competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs** and others. The most occurred **mcqs of ** Basic Electrical in past papers. **Past papers of ** Basic Electrical **mcqs**. **Past papers of ** Basic Electrical **MCQs**. Basic Electrical Mcqs are the necessary part of any competitive / job related exams. The Basic Electrical **mcqs** having specific numbers in any written test. It is therefore everyone have to learn / remember the related Basic Electrical **mcqs**. The Important series of Basic Electrical Mcqs are given below:

**Which of the followings is/are active element?**

A. Current source

B. Voltage source **C. Both**

D. None of these.

** If P is the power of a star connected system then what will be power of an equivalent delta connected system?**

A. P/3 **B. 3P**

C. P

D. None of the above

**Magnetic flux has the unit of**

A. Ampere-turn

B. Newton **C. Weber**

D. Tesla

**The voltage induced in an inductor is represented as,**

A. ratio of the current through it to its inductance.

B. ratio of its inductance to the current through it.

C. product of its inductance and current through it. **D. product of its inductance and rate of change of current through it.**

**Instantaneous power in inductor is proportional to the**

**A. product of the instantaneous current and rate of change of current.**

B. square of the rate of change of current.

C. square of instantaneous current.

D Temperature of the inductor.

**The unit of resistivity is**

A. Ω / metre. **B. Ω – metre.**

C. Ω.

D. Ω / m².

**How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?**

A. 60

B. 10 **C. 600**

D. 1200

**The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be**

A. 2R Ω

B. R Ω

C. 4R Ω**D. 8R Ω**

**The resistivity of the conductor depends on**

A. length of the conductor.

B. area of the conductor. **C. type of material.**

D. none of these.

**If 1 A current flows in a circuit, the number of electrons flowing through this circuit is**

**A. 0.625 × 10 ^{19}**

B. 1.6 × 10-

^{19}

C. 1.6 × 10

^{19}

D. 0.625 × 10-

^{19}

**Which of the following are the passive elements?**

A. Bulb

B. Resistor **C. Both**

D. None of these.

**Power dissipation in ideal inductor is**

A. Minimum

B. Maximum **C. Zero**

D. A finite value

**Inductor does not allow the sudden change of**

**A. current**

B. power

C. voltage

D. None of the above

**Capacitor does not allow the sudden change of ?**

A. power **B. voltage**

C. current

D. None of the above

**Internal resistance of ideal voltage source is ?**

**A. zero**

B. finite

C. infinite

D. 100 ohms

**Internal resistance of ideal current source is ?**

A. finite **B. infinite**

C. zero

B. 100 ohms

**Which quantity should be measured by the voltmeter ?**

A. Power **B. Voltage**

C. Current

D. Speed

**Which quantity consists of a unit 1KWh ?**

**A. Energy**

B. Power

C. Time

D. Charge

**Which of the following has no units?**

A. Moment of a magnet

B. Permeability **C. Magnetic susceptibility**

D Permittivity

**Which of the following quantities consists of SI unit as WATT ?**

A. Charge

B. Force

C. Current**D. Power**

**Electric pressure is also called________?**

A. power

B. resistance **C. voltage**

D. energy

**The substances which have a large number of free electrons and offer a low resistance are called____?**

A. inductors

B. insulators

C. semi-conductors**D. conductors**

**Out of the following which is not a poor conductor__________?**

A. Carbon **B. Copper**

C. Cast iron

D. Tungsten

**Out of the following which is an insulating material____________?**

A. Gold

B. Copper

C. Silver**D. Paper**

**The property of a conductor due to which it passes current is called___________?**

A. reluctance

B. resistance **C. conductance**

D. inductance

**Conductance is reciprocal of____________?**

**A. resistance**

B. reluctance

C. inductance

D. capacitance

**The resistance of a conductor varies inversely as___________?**

A. temperature **B. area of cross-section**

C. length

D. resistivity

**With rise in temperature the resistance of pure metals______________?**

**A. increases**

B. remains constant

C. first increases and then decreases

D. decreases

**With rise in temperature the resistance of semi-conductors_________________?**

**A. decreases**

B. first increases and then decreases

C. increases

D. remains constant

**The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?**

A. 1.4 x 10~8 Q-m

B. 1.2 x 10~8 Q-m **C. 1.6 x 10″”8 Q-m**

D. 1.8 x 10″8 Q-m

**An instrument which detects electric current is known as_____________?**

A. rheostat

B. voltmeter

C. wattmeter**D. galvanometer**

**In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is**

A. 80 V **B. 66 v**

C. 33 V

D. 132 V

**A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?**

A. 600 Q

B. 400 Q **C. 800 Q**

D. 1000 Q

**The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?**

A. 48 Q **B. 36 Q**

C. 18 Q

D. 64 Q

**Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?**

A. 200 Ω

B. 100 Ω

C. 300 Ω**D. 400 Ω**

**A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is_____________?**

A. 4.6 A, 6.9 A **B. 6.4 A, 9.6 A**

C. 6.4 A, 6.9 A

D. 4.6 A, 9.6 A

**Current velocity through a copper conductor is___________?**

A. independent of current strength

B. the same as propagation velocity of electric energy **C. of the order of a few ^.s/m**

D. nearly 3 x 108 m/s

**Which of the following material has nearly zero temperature co-efficient of resistance_________?**

**A. Manganin**

B. Carbon

C. Porcelain

D. Copper

**You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?**

A. three in parallel **B. two in parallel and one in series**

C. two in parallel

D. three in series

**Two resistors are said to be connected in series when___________?**

**A. same current passes in turn through both**

B. total current equals the sum of branch currents

C. both carry the same value of current

D. sum of IR drops equals the applied e.m.f.

**Which of the following statement is true both for a series and a parallel D. C. circuit?**

A. Elements have individual currents

B. Voltages are additive

C. Currents are additive **D. Power are additive**

**Which of the following materials has a negative temperature co-efficient of resistance?**

A. Aluminum

B. Copper **C. Carbon**

D. Brass

**Ohm’s law is not applicable to____________?**

**A. vacuum tubes**

B. high voltage circuits

C. carbon resistors

D. circuits with low current densities

**Which is the best conductor of electricity _______________?**

A. Copper **B. Silver**

C. Iron

D. Carbon

**For which of the following ‘ampere second’ could be the unit ?**

A. Power **B. Charge**

C. Reluctance

D. Energy

**All of the following are equivalent to watt except_____________?**

A. joules/sec.

B. (amperes) ohm

C. amperes x volts**D. amperes/volt**

**A resistance having rating 10 ohms, 10 W is likely to be a__________?**

A. carbon resistor

B. metallic resistor **C. wire wound resistor**

D. variable resistor

**Which one of the following does not have negative temperature co-efficient ____________?**

**A. Aluminium**

B. Rubber

C. Paper

D. Mica

**Varistors are______________?**

A. carbon resistors **B. non-linear resistors**

C. insulators

D. resistors with zero temperature coefficient

**Insulating materials have the function of______________?**

**A. preventing a short circuit between conducting wires**

B. preventing an open circuit between the voltage source and the load

C. storing very high currents

D. conducting very large currents

**Insulating materials have the function of___________?**

A. conducting very large currents **B. preventing an open circuit between the voltage source and the load**

C. preventing a short circuit between conducting wires

D. storing very high currents

**The rating of a fuse wire is always expressed in________________?**

A. ampere-volts

B. ampere-hours

C. kWh**D. amperes**

**The minimum charge on an ion is______________?**

A. equal to the charge of the number of electrons in an atom (#) zero **B. equal to the charge of an electron**

C. equal to the atomic number of the atom

**In a series circuit with unequal resistances______________?**

A. the highest resistance has the most of the current through it

B. the lowest resistance has the highest current

C. the lowest resistance has the highest voltage drop **D. the highest resistance has the highest voltage drop**

**The filament of an electric bulb is made of______________?**

A. aluminium

B. carbon **C. tungsten**

D. nickel

**A 3 Q resistor having 2 A current will dissipate the power of_______________?**

A. 2 watts

B. 6 watts

C. 4 watts **D. 12 watts**

**Which of the following statement is true________________?**

A. A galvanometer with high resistance in parallel is a voltmeter

B. A galvanometer with low resistance in parallel is a voltmeter **C. A galvanometer with low resistance in series is an ammeter**

D. A galvanometer with high resistance in series is an ammeter

**The resistance of a few meters of wire conductor in closed electrical circuit is____________?**

**A. practically zero**

B. high

C. low

D. very high

**If a parallel circuit is opened in the main line, the current_______________?**

A. increases in the branch of the lowest resistance

B. is zero in the highest resistive branch **C. is zero in all branches**

D. increases in each branch

**If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________?**

**A. 0.4 ohm**

B. 0.8 ohm

C. 0.6 ohm

D. 1.0 ohm