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Core type Transformers:
In this type of transformer the windings enclose the core (fig. given below). Both the windings are divided and half of every winding is placed on each limb to make the leakage flux as small as possible. Since insulation of low voltage winding is simple so low voltage winding is placed next to core and then high voltage winding is placed around the low voltage coils. In such an arrangement only single layer of high voltage insulation is required and removal or repair of the high voltage winding, which is more liable to faults than the low voltage winding, is simple and convenient.
Figure shows the magnetic circuit of a relay. When each of the air gaps are 1.5mm wide find the mmf required to produce a flux density of 0.75 T in the air gaps. Use the B-
The number of electrons in one molecule of are: (1)22 (2)44 (3)66 (4)88 Ans: 22
Cermets are a hybrid mixture of ceramic and metal. These are made by screening a mixture of glass and metal oxide on to a ceramic substrate. It is then fired at a temperature high
What seven colors appear to be white when mixed together? a) Red, b) orange, c) yellow, d) green, e) blue, f) indigo and g) violet. Though with the human e
tiger woods can hit a golf ball with 55n of force how hard does the ball hit back on the club
A straight vertical wire passes by a wooden table top. The wire carries an upward directed current. Evaluate the path of the magnetic field of the wire at a point on the table top
why gravitational energy for a system of particles is found by first finding the gravitational energy between individual particles and then adding it up? Ans) It is a scalar qua
There exist two types of charges in nature:- (i) Positive charge (ii) Negative charge Charges with the same electrical sign repel each other, and charges with oppo
Derive expression for total power consumed when three appliances of power p1 p2 nd p3 are connected in series.
Net force acting on particle of mass 2 kg is 10N in north direction.At t=o, particle was moving eastwards with 10m/s. Find displacement and velocity of particle after 2 seconds.
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