4 c's construction

Leclanche cell of an outer glass vessel which is filled with saturated ammonium chloride (NH 4 Cl) solution. In it there stands a zinc rod and porous pot 'P' containing a carbon rod 'c' which is packed round with a mixture of manganese dioxide (MnO 2 ) and powdered carbon. ..

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..

This laser consists of a discharge tube in the cylindrical shape containing helium Neon gas in the ratio 9:1 at a low pressure. Two mirrors M 1 and M 2 are placed at the ends to facilitate the longer availability of emitted photons. A large potential difference is applied between the anode (A) a..

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..

A solar cooker contains a box made of insulating material, with its inner surfaces blackened. The top is closed by a glass sheet. The box is closed such that the inner part does not come in contact with the outside air, there by reducing heat loss due to convection currents. The glass top reflects ..

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. (4h..

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) From C, cut off CB = 4.8 cm, B ly..

To construct an isosceles when altitude CD to the base AB is 2 cm and the vertical angle C = 90 o (1) Take any straight line XY and at any point D on it, draw cutting off DC = 2 cm. Join DC. (2) At C, on either side of DC, construct angles DCA and DCB, respec..

). At Y, make an angle of 30 o ( ). Produce their arms to meet at A. (3) Draw perpendicular bisectors of AX and AY to meet XY at B and C. (4) Join AB and AC. Then is the required triangl..

To construct angles of 90 o , 45 o and 135 o (i) Draw a line AB and mark any point O on it. (ii) With O as centre, draw an arc of any suitable radius which cuts AB at P. (iii) With P as centre and the same radius, cut this arc at Q. (iv) From Q, with the same radius, cut the arc again at ..