It is compulsory an magnetic field to produce an current?

SHASHI

• Mar 24th, 2012

NO, ONLY WHEN THE MAGNETIC FLUX LINKED WITH A SURFACE CHANGES CURRENT IS PRODUCED,i.e when the body or magnetic lines are moving.

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A heater of 1500w, bulb of 100w & 40w are connected respectively as sequence as stated above across supply. What effect will be observed on illumination/power consumtion of all of them?Now sequence is changed as bulb of 40w then heater & last bulb of 100w. What effect will be seen on illumination/power consumption of all of them?

Jai Pradeep

 Profile Answers by Jai Pradeep Questions by Jai Pradeep

• Mar 13th, 2011

In the first method the heater with 1500Watts connect, i.e large load is connected in first of a sequence so most power consumed by this. The 100 & 40 watts bulb will illuminated lighter.In the seco...

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Why current coil and pressure coil of wattmeter is connected in different phases for reactive power meaurement?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 8th, 2011

You have to draw a phasor diagram. then U will get it easily. Draw Vr, Vy, Vb with 120 degree displacement. Now draw Ir leading(lagging) Vr by some angle, Say 0. and Iy displaced 120 degree to Ir, sa...

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