UNIT TEST (190503)

CLASS 10 

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If the object distance is 10 cm from concave mirror and the focal length of mirror is 20 cm find the image distance.

If the focal length of concave lens is 50 cm find power of the lens?

Find the total resistance if we connect four resistance of 8 ohm is series and parallel

A 6 cm object is placed perpendicular to the principal axis of a convex lens of focal length 15 cm. The distance of the object from the lens is 10 cm. Find the position, size and nature of the image formed, using the lens formula.

Write the mirror and lens formula?

What is the meaning of magnification -4.

Find the 20^th term of AP 3,6,9……….

Find the sum of first 100 natural number.

CLASS 9 

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If one angle is 5 times of another and both making complementy angle find the angle.

If x + y = 12 and xy = 32, Find the value of x² + y².

If 3x + 2y = 12 and xy = 6, find the value of 9x² + 4y².

Factorize  4x² – 3x + 7

Find the remainder when x³ + 3x² + 3x + 1 is divided by x+1 and x-1

 Evaluate the following products without multiplying directly 105×95 , (199)² 

CLASS 8

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Write the law of reflection.

Write the application of plane, concave and convex mirror.

What is the smallest number be added to 9999 to became a perfect sq.

What do you understand with the battle of 1857. (in 100 words)

Why we don’t use antibiotics in viral disease?

Write the name of various part of eye. And write its functions.

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