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In an amplitude modulated wave. the value of V is max 10V and Vmin is 5V, then % modulation is :

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In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load  (A) The armature current increases and the power factor decreases  (B) The armature current decreases and the power factor also decreases  (C) The armature current decreases and the power factor increases but is lagging  (D) The armature current decreases and the power factor increases and is leading

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 152 views
The effect of increasing load on a synchronous motor running with normal excitation is

The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.

asked Apr 28, 2018 in Electrical Machine by Shimroz123
1 answer 36 views
The ratio of limiting friction and normal reaction is known as?

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

asked Mar 22, 2018 in Engineering Mechanics by Shimroz123
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