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In the figure a cylindrical wrapper of f...

In the figure a cylindrical wrapper of flat tablets is shown The radius of tablet is 7 mm and its thinkness is 5 mm. How many such tablets are wrapped in the wrapper?

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The correct Answer is:
20
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The cross section of a cable is shown in fig. The inner conductor has a radius of 10 mm and the dielectric has a thickness of 5 mm . The cable is 8 km . Long. Then the capacitance of the cable is [log_(e) 1.5 =0.4] . .

In the figure , a convex mirror of radius of curvature 20 cm is shown. An object O is placed in front of this mirror. Its ray diagram is shown. How many mistakes are there in the diagram (AB is its principal axis)

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In order to supplement daily diet, a person wishes to take X and Y tablets. The contents (in milligrams per tablet) of iron, calcium and vitamins in X and Y are given as below : Tablets Iron Calcium Vitamin X 6 3 2 Y 2 3 4 The person needs to supplement at least 18 milligrams of iron, 21 milligrams of calcium and 16 milligrams of vitamins. The price of each tablet of X and Y is Rs. 2 and Rs. 1 respectively. How many tablets of each type should the person take in order to satisfy the above requirement at the minimum cost ? Make an LPP and solve graphically.

A long cylindrical wire carrying current of 10 A has radius of 5 mm find its its magnetic field induction at a point 2 mm from the centre of the wire

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Knowledge Check

  • The cross section of a cable is shown in fig. The inner conductor has a radius of 10 mm and the dielectric has a thickness of 5 mm . The cable is 8 km . Long. Then the capacitance of the cable is [log_(e) 1.5 =0.4] . .

    A
    `3.8 mu F`
    B
    `1.1 mu F`
    C
    `4.8 xx 10^(-10) mu F`
    D
    `3.3 mu F`

  • In the figure , a convex mirror of radius of curvature 20 cm is shown. An object O is placed in front of this mirror. Its ray diagram is shown. How many mistakes are there in the diagram (AB is its principal axis)

    A
    3
    B
    2
    C
    1
    D
    0

  • A long cylindrical wire carrying current of 10 A has radius of 5 mm find its its magnetic field induction at a point 2 mm from the centre of the wire

    A
    `1.6xx10^(-4) T`
    B
    `2.4xx10^(-4) T`
    C
    `3.2xx10^(-4) T`
    D
    `0.8xx10^(-4) T`