FREE Master of Electrical Engineering Questions and Answers
Which of the following electrical engineering components cannot be examined using Ohm's law?
Since unilateral networks only permit one direction of current flow, Ohm's law cannot be applied to them. A unilateral network is created by transistors. So, it is impossible to apply Ohm's law to transistors.
What happens to the force between the two conductors when the operating distance between them grows?
Since the force between two conductors is inversely proportional to the distance between them, the force between them decreases as the distance between them increases.
Due to the electric current flowing through a long wire, the magnetic field at a location d distance from it is .
B = µ0i/2πr calculates the magnetic field at a distance d from a long wire carrying current.
A 100 Hz AC signal will complete how many cycles in two seconds?
The frequency in electrical engineering is defined as the ratio of cycles to total time. Given that the time is 2 seconds and the frequency is 100 Hz, a total of 200 cycles will be made.
Typically, batteries are connected in
Since voltages add up once batteries are connected in series, this is the usual way to connect batteries so that we can get the desired voltage.
The force between two conductors that are infinitely parallel is inversely proportional to .
The force exerted between two conductors when current is flowing through them is directly proportional to the sum of the currents through them and inversely proportional to their separation.
What will the change in the electrons' drift velocity in relation to the electric field be?
Drift velocity is essentially the average speed that free electrons in metal achieve when an electric field is applied. The direction of the supplied electric field will be opposed by the drift velocity of the electrons found in metal.
Where in a charged spherical shell does electro-static shielding take place?
Electrostatic shielding is the general term for the fact that there is no electrical field inside the spherical shell. The square of the radius has an inverse relationship with the electric field outside the sphere.
The total resistance in a ________ circuit is higher than the highest resistance present.
The overall resistance in a series circuit is equal to the total resistance in the circuit, hence the total is greater than the largest resistance.
The equation for the force per unit length between two infinite parallel conductors is .
If B, I and l are perpendicular to one another, Bil gives the force of an infinite conductor. If d is the distance between two infinite parallel conductors, then F/l => Bi = µ0i1i2/2πd.
If a current of 30A is passed through a cross-sectional area of 0.5m2, what is the metal's current density?
The ratio of the current flowing across a cross-sectional area is known as the current density. If a cross-sectional area of 0.5 m2 is subjected to a current of 30 A.
Which connection is the most economical?
Since they share the supply voltage, series connections have the benefit of allowing the use of low-cost appliances.
Which of the following statements about alternating current is true according to the principles of electrical energy?
Alternating current travels in both directions and experiences time-dependent value changes. Because of the characteristics of alternating current, less power is lost during transmission, allowing for longer distances.
The total resistance in a ___________ circuit is lower than the smallest resistance present. The total resistance in a ___________ circuit is lower than the smallest resistance present.
The equivalent resistance in a parallel circuit is equal to the reciprocal of the sum of all the resistances in the circuit. As a result, it is less than the circuit's least resistance.
Which of the following accurately depicts an AC circuit's peak value?
In an AC circuit, the ratio of the peak value to the RMS value is known as the peak factor. How extreme the peaks are in a waveform is indicated by the peak factor, also known as the crest factor.
According to fundamental electrical energy, what is constant for a charged spherical shell? According to fundamental electrical energy, what is constant for a charged spherical shell?
The electrical potential inside the spherical shell is constant and is denoted as V = kq/R, where k = 1/4o, in accordance with electrical energy principles. This potential is identical to the potential on the sphere's surface. The electrical potential inside the spherical shell is constant and is denoted as V = kq/R, where k = 1/4o, in accordance with electrical energy principles. This potential is identical to the potential on the sphere's surface.