⚡ Electrical Engineering Solved MCQs with Answers

Practice 757 approved ⚡ Electrical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

757 solved MCQs

A quantity known as the ______ indicates the total resistance of the circuit.Answer: Equivalent resistance The _______ is used to indicate the amount of current flowing to and from the battery.Answer: Ammeter The ______ is the basis of relays and motors and generators.Answer: Magnetic effect A common method of protection is to use a ______ in the lighting circuit.Answer: Fuse In case of electrical shock, what kind of first aid should be provided to the person?Answer: Providing Oxygen The property of the wire used for fuse making?Answer: High resistivity and low melting temperature An alloy used in making heating elements for electric heating devices (electric heater) is ______?Answer: Nichrome What is the typical voltage used in a handheld metal detector?Answer: 1.5 to 9 volts What is the typical voltage range for a handheld metal detector?Answer: 6V – 9V The electricity we use at home is calledAnswer: Alternating current What is measured by an ammeter?Answer: Electric current (small current) The minimum current which can get human in comma is :Answer: 2 milli ampere For the protection of electrical appliances fuses are widely used, the value of fuse is in :Answer: Amperes A moter operates from a 120-volt electrical source and use four amperes of current. What is the power generated by the motor?Answer: 480 W Electronic - Banking is synonymous with?Answer: Internet Banking What is the installed electricity generation capacity of Pakistan as of March 2024?Answer: 42,131 MW Work done on a unit charge is equal to change in its…………Answer: Electric potential The unit for emf is …….Answer: Volt Weber is the unit for ……….Answer: Magnetic flux The semiconductor substance containing holes are called ………….Answer: P-type semiconductor Emf =VBL sinθ(related to that):Answer: Volts The force F experienced by a conductor of length L carrying current when placed in a uniform magnetic field Bis given by the relation.Answer: F = BIL High voltage is obtai9ned form?Answer: None of these When effective value of current is 10. What is its peak value?Answer: 14.5 In diodes, the graph is drawn b/w?Answer: Voltage & current It the color code on a carbon resistor from left to right are white, violet and red, then the resistance will be:Answer: None of these In step up transform current across secondary:Answer: Decreases The resistance of a conductor depends upon:Answer: Temperature difference When the frequency of oscillator is slightly greater than that of resistance amplitude will be.Answer: Rapidly decreases Which material would provide best shielding for Coulombs’ force?Answer: Benzene