1 b construction

A simple D.C. generator consists of a rectangular coil ABCD which can be rotated rapidly between the poles N and S of a strong horse-shoe type magnet M. The generator coil is made of a large number of turns of insulated copper wire. The two ends of the coil are connected to the two copper half ring..

Through A, B and C draw lines parallel to BC, AB and AC respectively. Let these lines meet at P, Q and R forming D PQ..

It consists of N turns of coil PQRS wound over a non-magnetic metallic frame usually rectangular or circular. The coil is suspended from a torsion head H by means of phosphor bronze strip in a magnetic pole by pieces N and S. A mirror M is attached to the phosphor bronze strip. The other end of th..

To construct an angle equal to a given angle and a point Q on a line PQ. An angle equal to at Q. (i) With B as centre and any suitable radius draw an arc to cut AB at D and BC at E. (ii) With Q as centre and the same radius, draw an arc to cut PQ at ..

Analysis for construction shows Analysis for construction: that you have to draw CF||BD Think how you can complete to meet DE produced at F. a parallelogram with DB and BC as consecutive sides. You will find the need to draw CF||D..

It consists of a soft iron core made of laminated sheets well insulated from each other. The coils P 1 P 2 and S 1 S 2 are wounded on the same core. The coil P 1 P 2 is a primary coil connected to AC source and S 1 S 2 is a secondary coil connect..

A photographic camera consists of a converging lens system at least one end of a box and a light sensitive film at the other end, a focusing device for adjusting the distance of the lens from the film and an exposure arrangement which provides the correct exposure. The object is placed i..

It consists of two dees or D-shaped metal chambers D 1 and D 2 . The dees are separated by a small distance. The two dees are perpendicular to their plane. P is the position where the ion source is placed. The dees are maintained to a potential difference whose polarity alternates with ..

The biogas plant is a brick and cement structure having the following five sections: Mixing tank present above the ground level Inlet chamber: The mixing tank opens underground into a sloping inlet chamber Digester: The inlet chamber opens from below into the digester which is a huge tank..

To construct a right angled D ABC when hypotenuse AC = 4 cm and hypotenuse and one acute angle are given (1) Draw a straight line AC = 4cm. (2) Taking OC as diameter, draw a semi circle on AC. (3) At A, construct meeting the semicircle at B. Join BC..