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State the need for reduction of harmonics in inverters.

Recent questions tagged ratio

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Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.

asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
1 answer 49 views
1 answer 83 views

The ratio of the width to the height of the picture frame is called as A) Rastar B) Aspect Ratio C) Length Ratio D) Efficiency  

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 29 views

If the fault current is 6000 A, the relay plug setting is 150% and the CT ratio is 400/5, the plug setting multiplier will be

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 19 views

Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is

asked May 8, 2018 in Control System by Zeeshan
1 answer 39 views

A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would  (1) increase progressively  (2) decrease progressively  (3) decrease to a minimum value at α = 0.5 and then increase  (4) increase to a maximum value at α = 0.5 and then decrease

asked Apr 30, 2018 in Power Electronics by Shimroz123
1 answer 16 views

If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is :  (A) 2.8 (B) 2.6 (C) 4.6 (D) 3.6

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 13 views

The ratio of full -load volt-amperes to short-circuit volt-amperes is equal to :

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 27 views

Specific energy consumption of an electric train is the ratio between (A) Specific energy output at driving wheels and efficiency of the traction motor (B) Specific energy output at driving wheels and efficiency of the transmission gear (C) Specific energy output of driving motor and efficiency of the driving wheels (D) Specific energy output at driving wheels and efficiency of the (motor + transmission gear)

asked Apr 28, 2018 in Power Electronic Controlled Drives by Shimroz123
1 answer 32 views

Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) is greater than that of a normal induction motor (D) may be less or greater than that of a normal induction motor

asked Apr 28, 2018 in Electronics Engineering by Shimroz123
1 answer 12 views

The Eb/V ratio of a d.c. motor is an indication of its?

asked Mar 26, 2018 in DC motor by Shimroz123
1 answer 21 views

The ratio of mass of proton to that of electron is nearly?

asked Mar 25, 2018 in Basic concepts by Shimroz123
1 answer 91 views

Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as?

asked Mar 25, 2018 in Basic concepts by Shimroz123
1 answer 41 views

The ratio of active power to apparent power is known as____ factor.

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
1 answer 36 views

The ratio of limiting friction and normal reaction is known as?

asked Mar 22, 2018 in Engineering Mechanics by Shimroz123
1 answer 20 views

The voltage transformation ratio of a transformer is equal to the ratio of?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 20 views

Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 24 views

Use of auto-transformer is economical when the transformation ratio is?

asked Mar 19, 2018 in Transformer by Shimroz123
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