1 4 construction

A box contains four types of pens: Type 1, Type 2, Type 3 and Type 4. Construct a bar graph to represent the number of pens in each type. What percent of the total number of pens belong to Type 2? Type 1 2 3 4 Number of pens 13 8 9 10 => G..

Solar Furnace This type can be used for cooking. But the time of cooking depends on the intensity of the sunlight and hence the time taken is shorter in the summer and longer in the winter. Rice, pulses and vegetables can be boiled by keeping them inside the box. Baking and frying can be done in re..

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..

The figure below shows the construction of an electric motor. The main parts of an electric motor are: D.C. Motor the armature coil ABCD mounted on an axle the commutator that is a split ring divided in two parts S 1 and S 2 a pair of brushes B 1 and B 2 a horse - shoe..

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..

Constructions are to be drawn by using ruler and compass only. It must be stressed that not all constructions are possible using a compass and straight edge alon..

The electron beam emitted by a filament is accelerated through a large potential difference in an electron gun. The electron beam is subjected to a magnetic field created by an electromagnet. This beam falls on the object. This beam passes through the object and enters again a magnetic field produ..

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..

Construction - 14 - 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..

Construction - 12 - To construct when , AC = 4 cm, BC = 4.8 cm, two sides and the angle opposite to one of them are given. (1) Draw a straight line AX (2) At A, Construct (3) From A, cut off AC = 4 cm. (4) Fro..