For given applied voltage, with the increase in frequency of the applied voltage? Answer : For given applied voltage, with the increase in frequency of the applied voltage eddy current loss will remain unchanged. ...

What will happen if you increase the current in the motor? Answer : Increasing current means increasing frequency of the motor because current is directly proportional to rotations of the motor rotor...

How can we increase the induced current? Answer : Induced current can be increased by reducing no of windings on the secondary part compared to primary....

Why does the speed of a DC shunt motor decrease as the load increases? Answer : Because if the load is increasing then the torque must also be increase. If not then the speed of motor will decrease....

Why inductor current lags inductor voltage ? Answer : Inductor is a wire wounding structure having a core material it induces emf which is opposite to the voltage supply and proportional to rate of change of current so current lags the voltage in inductor...

About trnsformer Answer : Acc to Ohms law V=IR but it is only applicable when our resistance R is constant, as in case of transformer we take impedence which is equivalent to resistance is not constant it varies with system parameters that why Ohms law not applicable in case of transformer...

Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficac Answer : 1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series. 2) Effect on Lumen output:- If voltage is increased then brightness of LED get increased. 3) E...

With the help of N-channel JFET describe the effect of input voltage VGS on output current ID. Answer : Working of N channel FET: * When a voltage is applied between the drain and source with a DC supply (VDD), the electrons flows from source to drain through narrow channel existing between the depletion regions. * This constitutes drain current, ID. * The value of drain current is max...

Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset v Answer : Definition of parameters of OPAMP is follows: i) Input Offset Voltage: Input offset voltage is defined as the voltage that must be applied between the two input terminals of an OPAMP to null or zero the output ii) Input offset Current: The input offset current Iio is the difference between the c...

A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Deter Answer : Solution ...

Source transformation voltage source to current source and vice versa

What kills, current or voltage? Answer : Current would kill. You can actually have thousands of bolts going through you and not even know it. Yes you probably know already voltage is current times resistance. Since your body is a resistor it would take just a small amount of current to create a very high voltage...

Explain lagging quantity and leading quantity, explain this concept with voltage and current wavefor Answer : When two alternating quantities attain their respective zero or peak values simultaneously, the quantities are said to be in-phase quantities. When the quantities do not attain their respective zero or peak values simultaneously, then the quantities are said to be ou-of-phase quantities. The qu...

Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer. Answer : 1) Voltage ratio: The voltages in primary and secondary winding is proportional to number of turns in primary and secondary respectively. So, the voltage ratio is same as transformation ratio. V2/V1 = N2/N1 = K If the number of turns of secondary winding (i.e. N2) is more than number...

Write the relation between phase and line current, phase and line voltage for Star connection. Answer : Line voltage is equal to root three times of phase voltage and line and phase currents are equal in star connection...

A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current req Answer : A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω ...

Step-down transformer converts high voltage and low current into: (A) How voltage and high current Answer : Step-down transformer converts high voltage and low current into: Low voltage and high current ...

Which of the following is the least expensive protection for over current in low voltage system? ( Answer : Which of the following is the least expensive protection for over current in low voltage system? (A) Rewireable fuse (B) Isolator (C) Oil Circuit breaker (D) Air break circuit breaker ...

A current controlled voltage source is equivalent to : (A) series voltage feed -back amplifier (B) Answer : A current controlled voltage source is equivalent to : shunt voltage feed -back amplifier ...

Which of the following theorems enables a number of voltage (or current) source to be combined direc Answer : Which of the following theorems enables a number of voltage (or current) source to be combined directly into a single voltage (or current) source. (1) compensation theorem (2) reciprocity theorem (3) superposition theorem (4) Millman's theorem ...

A network that consists of at least a voltage source or current source is called A) Active network Answer : A network that consists of at least a voltage source or current source is called Active network ...

The internal resistances of an ideal current source, and an ideal voltage source are, respectively, Answer : The internal resistances of an ideal current source, and an ideal voltage source are, respectively, ∞, 0 ...

A network is said to be under resonance when the voltage and the current at the network input termin Answer : A network is said to be under resonance when the voltage and the current at the network input terminals are in phase ...

Answer : In order that current should flow without causing excessive heating or voltage drop, the relay contacts should have low contact resistance, be clean and smooth, be of sufficient size and proper shape. ...

Electrical shock happens for voltage/current? Answer : The severity ofelectric shockdepends on thecurrentflowing through the body, which is a function of the electromotive force (E) involts, and the contact resistance (R) in ohms....

When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. Answer : If v = 1 volt and i = 1 micro amp, i= 10^(-6) So R = V/I, R= 1/10^(-6) , R= 10^6 And now Conductance G = 1/R So G = 10^(-6) mho..... Answer...

How to Increase Gas Mileage Answer : How to Increase Gas Mileage Gasoline is a top priority in the budget of any car owner. You’ll be surprised at how much you spend on gasoline in between refills, especially if you drive every day. With pump prices reaching record highs and environmental issues with carbon emissions and fossil fuel ...

How to Increase Fiber in Your Diet ? Answer : How to Increase Fiber in Your Diet Increasing fiber in your diet has many health benefits. Fiber is shown to lower cholesterol levels, lower the chances of getting type 2 diabetes, decrease the possibility of heart disease and even lower the chances of getting colon cancer. It also helps with irrita...

Answer : The size of a synchronous motor decreases with the increase in flux density. ...

Reduction in core losses and increase in permeability are obtained with transformer employing? Answer : Reduction in core losses and increase in permeability are obtained with transformer employing core built-up of laminations of cold rolled grain oriented steel. ...

What are three ways you can increase the strength of an electromagnet? Answer : To increase the strength of an electromagnet, you can make the following adjustments: 1. **Increase the Number of Coil Turns**: - The magnetic field strength of an electromagnet is directly proportional to the number of turns of the wire coil around the core. By increasing the number of turns, y...

Why high voltage test is done? Answer : High voltage tests are performed for several reasons: Insulation Integrity: To ensure the insulation of electrical equipment can withstand high voltage stresses without breaking down. This is crucial for preventing short circuits, electrical faults, and equipment damage. Quality Control: To verify...

Why high voltage can reduce power loss? Answer : when voltage has increased due to reduced current flow, thus power loss given by ( I^2R) will be low due to reduced current(I^2) provided that resistance (R) is constant....

Why high voltage is used in power transmission? Answer : The primary reason that power is transmitted at high voltages is to increase efficiency. ... The lower current that accompanies high voltage transmissionreduces resistance in the conductors aselectricity flows along the cables. This means that thin, light-weight wires can beused in long-distance tr...

Refer to the circuit below. The total absorbed (consumed) power is: Answer : To determine the total absorbed (consumed) power in a circuit, you need to consider the power absorbed by each component. The absorbed power can be calculated using the formula: \[ P = V \times I \] where \( P \) is the power, \( V \) is the voltage across the component, and \( I \) is the current...

Draw the Delta connected three phase system showing all the voltages and currents. Write the power e Answer : Sure! Here’s a description of a Delta (Δ) connected three-phase system, including all the voltages and currents: 1. **Delta Connection (Δ):** In a Delta connection, each phase of the load or source is connected in a closed loop, forming a triangle. The ends of each phase are connected to the ends o...

Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of a Answer : Gate Turn Off Thyristor (GTO) • Conventional Thyristor can be turned on with gate terminal but can not turn off from gate terminal.• But in case of Gate Turn Off Thyristor (GTO), we can turn it on and off from its gate terminal.• By giving positive signal GTO can be turned on and by giving negativ...

In voltage source converter based HVDC transmission system the active power is controlled by changin Answer : In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage ...

How do you fix voltage drop? Answer : Voltage drop occurs when the voltage at the end of a circuit is lower than at the beginning, typically due to resistance in the conductors or connections. Here are some common methods to address and fix voltage drop issues: 1. **Increase Wire Size**: Use larger gauge (thicker) wires to reduce resis...

What is meant by flash over voltage?

What is dielectric withstand voltage?

What is the definition of extra low voltage? Answer : Extra-low voltage (ELV) is an electricity supply voltage in a range which carries a low risk of dangerous electrical shock. ...

What is the difference between line and phase voltage? Answer : Line voltage is voltage between two phases R &Y (415 v) while phase voltage is the voltage between one phase and a neutral B & N (240 v). ...

What is impulse voltage of transformer?

What is Extra High Voltage?

What is the difference between a line voltage and low voltage control system? Answer : In control systems, the terms "line voltage" and "low voltage" refer to the electrical characteristics of the system and its components. Here’s a breakdown of their differences: ### Line Voltage Control System - **Voltage Level**: Typically operates at higher voltage levels, such as 120V, 240V, or ...

What are the advantages of high voltage transmission? Answer : Advantages: 1. As Transmission voltage increases, current decreases. 2. As current decreases, cross section of conductor decreases. 3. As cross section of conductor decreases, its weight decreases. 4. As weight of the conductor decreases, design of tower becomes lighter in weight. 5. A...

What is a high voltage test? Answer : A high voltage test is a procedure used to assess the insulation strength and integrity of electrical equipment or systems by applying a voltage significantly higher than its normal operating voltage. This type of test helps ensure that the equipment can handle potential surges or faults without fai...

What is considered low voltage and high voltage? Answer : The definitions of low voltage and high voltage can vary depending on the context and the standards in different countries or industries, but here’s a general idea: - **Low Voltage**: Typically refers to voltages that are considered safe to handle with minimal risk. Commonly, this includes voltages...

What is the difference between line and phase current? Answer : The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current...

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