A spiral is made up of successive semicircles, with centres alternately at A and B, starting with centre at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, .... as shown in Fig. What is the total length of such a spiral made up of thirteen consecutive semicircles ?

A spiral is made up of sucessive semicircles with centres alternately at A and B, starting with centre at A, of radii 0.5cm,1.0cm, 1.5cm, 2.0cm…..as shown in Fig. What is the total length of such a spiral made up of 13 consecutive semicircles? (Take pi = (22)/(7) )

With the same centre O ,draw two circles of radii 4 cm and 2.5 cm.

A point charge +10 muC is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in Fig. What is the magnitude of the electric flux through the square? :

Given a circle with centre O and radius 2.5 cm, what is the length of the longest chord of the circle?

A point charge +10 muC is at a distance 5 cm directly above the centre of a square of side 10 cm as shown in the figure What is the magnitude of the surface flux through the square?

A point charge of 2.0 muC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?

In the circle of 5cm.radius, what is the length of the arc which subtends and angle of 33^(@)15' at the centre.