### Engineering > Electrical Engineering

## AC FUNDAMENTALS CIRCUITS AND CIRCUIT THEORY MCQs

### Total Questions : 109

**Page 1 of 6 pages**

- Increases with the decrease of capacitance and decrease of resistance
- Increases with the decrease of capacitance and increase of resistance
- Increases with the increase of capacitance and decrease of resistance
- Increase with increase of capacitance and increase of resistance

**Answer: Option D**

### What is the fundamentals of alternating current?

The alternating current is that current which flows in a conductor in one direction for some time and immediately it flows, in the opposite direction for sometime. The shape of the wave form obtained decides the type of alternating quantity or current or voltage.

### What is AC series circuit?

An RLC series circuit is a resistor, capacitor, and inductor series combination across an ac source. The same current flows through each element of an RLC series circuit at all points in time.

### What is the basic AC DC theory?

This flow of electrical charge is referred to as electric current. There are two types of current, direct current (DC) and alternating current (AC). DC is current that flows in one direction with a constant voltage polarity while AC is current that changes direction periodically along with its voltage polarity.

### How do AC circuits work?

As the wire spins and periodically enters a different magnetic polarity, the voltage and current alternate on the wire. This current can change direction periodically, and the voltage in an AC circuit also periodically reverses because the current changes direction.

### Where is alternating current used?

Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket.

### What is difference between AC and DC?

Electric current flows in two ways as an alternating current (AC) or direct current (DC). In alternating current, the current keeps switching directions periodically – forward and backward. While in the direct current it flows in a single direction steadily.

### What is AC circuit analysis?

AC circuit analysis. The story so far: 1. For circuits that are driven by sinusoidal sources (e.g. vs(t) = Vm·cos(ωt) ), the voltages and currents are always sinusoids oscillating at the same frequency as the source and having distinct amplitudes.

### What is frequency in AC circuit?

Alternating current (ac) frequency is the number of cycles per second in an ac sine wave. Frequency is the rate at which current changes direction per second. It is measured in hertz (Hz), an international unit of measure where 1 hertz is equal to 1 cycle per second.

### What is the principle of AC DC conversion?

AC/DC converters are electrical circuits that transform alternating current (AC) input into direct current (DC) output. AC/DC Converters are also called “rectifiers”; they convert the input AC voltage to variable DC voltage, then optimize it through a filter to obtain an unregulated DC voltage.

### How AC power is generated?

Turbine-based AC electrical generation is when an electric current is induced by the interaction between charged particles and magnetic fields which converts the kinetic energy of the turbine into the kinetic energy of electrons. This is where a high energy society gets most of its electricity from.

### Why is AC used over DC?

The major advantage that AC electricity has over DC electricity is that AC voltages can be readily transformed to higher or lower voltage levels, while it is difficult to do that with DC voltages. Since high voltages are more efficient for sending electricity great distances, AC electricity has an advantage over DC.

### How many types of AC circuits are there?

Animation shows the intantaneous waveforms for the six types of Series AC Circuits: R - resistor. L - ideal inductor. C - capacitor.

### How does AC travel?

AC in long-distance transmission- The usual alternating current has a frequency of 60 Hz in North America and 50 Hz in Europe. Current has a periodic back and forth direction in a second, and the energy flows continuously from the electric source to the device.

### What are the properties of AC?

There are five characteristics of AC power; Amplitude, Cycles, Frequency, Peak to Peak, and RMS.

### What are the advantages of AC?

· Reduced Possibility of Asthma Attacks.

· A More Secure Home.

· Cool Place to Exercise.

· Less Insects and Parasites.

· Better Sleep.

· Prevents Electronics From Overheating.

· Improves Work Performance.

· Reduces the Risk of Dehydration

### What are the two types of AC voltage?

Both Alternating Current and Direct Current describes the two types of current flow in a circuit. In direct current, the electric charge or current flows in one direction. In alternating current, the electric charge changes direction periodically.28-Mar-2021

### What is AC waveform?

A waveform is a representation of how alternating current (AC) varies with time. The most familiar AC waveform is the sine wave, which derives its name from the fact that the current or voltage varies with the sine of the elapsed time.

### What is maximum voltage in AC circuit?

423 volts.

### What is form factor in AC circuit?

In electronics or electrical engineering the form factor of an alternating current waveform (signal) is the ratio of the RMS (root mean square) value to the average value (mathematical mean of absolute values of all points on the waveform).

### Why AC is a sine wave?

Originally Answered: Why is an AC signal called a sin wave? Because the Voltage traces out a sinusoid. Because the Voltage is produced by a rotating magnetic field with a fixed coil around it. The amplitude of the induced voltage depends upon the amount of flux cutting the coil.

### What is the name of AC to AC converter?

A cycloconverter is a transformer that converts AC power of one frequency to another.

### Why AC is used for transmission?

AC is used for long distance power transmission instead of DC because it is more convenient to step up/down voltage for AC than DC.

### What is the classification of AC circuit?

There are various types of AC circuit such as AC circuit containing only resistance (R), AC circuit containing only capacitance (C), AC circuit containing only inductance (L), the combination of RL Circuit, AC circuit containing resistance and capacitance (RC), AC circuit containing inductance and capacitance (LC) and ...

### What are some disadvantages of AC?

· It is less dangerous than DC but more attractive.

· Working with AC is much more dangerous than high voltage DC.

· AC can not be used for electrofishing, electroplating, etc.

· Cannot charge batteries directly from AC.

· Fatal accidents can happen with the slightest disregard.

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