Shikha took a small aluminium rod AB and suspended it horizontally by means of two connecting wires from a stand. Then, she placed a strong horseshoe magnet in such a way that the rod is between the two poles with the field directed upwards.

(A) Analyse the below situations and state what happens:

(1) when current is passed in the rod from B to A?

(ii) when direction of current is reversed?

(B) What would happen if the poles of the magnet shown above are interchanged?

(C) When will the displacement of the rod be largest?

Y

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The side QR of triangle pqr is produced to a point S if the bisector of angle pqr and angle PRS meet at the point t then prove that angle QTR is equal to half of angle QPR 

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14, 21, 28, 35, . . . . and 26, 39, 52, 65 . . . are two arithmetic
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th term of the first arithmetic progression is
 the same as the q
th term of the second arithmetic progression. Derive
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The side of an equilateral triangle is 4 cm, its perimeter is 12 cm .
Plot a graph of perimeter against length of side with the side increasing at interval of 2 cm .
Shown on your graph :
(a) what will the perimeter be when the side is 7 cm ?
(b) What will the side be when the perimeter is 15 cm ?

9/4 +5/4=