4 m construction

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 bet..

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..

A circular tank of thickness 30 cm and height 80 cm whose diameter is 4 m is to be constructed in a storage yard. The rate of construction is $10 per m 3 . Find the cost of construction. [Take π = 3.] => $14.94 or $3090 or $284 or $30.9..

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 ..

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) From C, cut off CB = ..

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 meeting the semi..

Construction - 6 - To bisect a given line segment AB is a line segment. The bisector of AB. (i) With A as centre and a suitable radius greater than AB of length, draw arcs on either side of AB. (ii) With the same radius and B as centre, cut the previous pair of arcs at points P and Q. (ii..

Construction - 7 - To construct a perpendicular to a line from a point outside it A line AB and a point O outside it. It is required to construct a perpendicular to AB from O. (i) With O as centre, taking any suitable radius, draw an arc to cut AB at S and T. (ii) With..

Water flowing in high altitude rivers is stored in a man-made reservoir as shown in the figure. The kinetic energy of the flowing water is transformed into potential energy as the water level rises. This water is carried through pipes to the turbine situated at the bottom of the dam. The water ..

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, respectively, each being e..