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A block of aluminium of mass 1 kg and vo...

A block of aluminium of mass 1 kg and volume `3.6 xx 10^(-4) m^3` is suspended from a string and then completely immmersed in a container of water. The decreases in tension in the string after immersion is (use `g = 10 ms^(-2))`

A

9.8 N

B

6.2 N

C

3.6 N

D

1.0 N

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • A block of aluminium of mass 1 kg and volume 3.6 xx 10^-4 m^3 is suspended from a string and then completely immersed in a container of water. The decrease in tension in the string after immersion is.

    A
    `9.8 N`
    B
    `6.2 N`
    C
    `3.6 N`
    D
    `1.0 N`

  • A block of mass 4 kg and volume 5xx10^(-4) m^(3) is suspended by a spring balance in a lift which is accelerating. The apparent weight shown by the spring balance is 3 kg. Now the block is immersed in water in kg shown by the spring balance is

    A
    2.375
    B
    2.625
    C
    2.5
    D
    3.125

  • Three identical blocks each of mass m = 1 kg and volume 3 xx 10^(-4) m^(3) are suspended by massless strings from a support as shown. Underneath are three identical containers containing the same amount of water that are placed over the scales. In Fig. (a), the block is completely out of the water, in Fig. (b), the block is completely submerged but not touching the beaker and in Fig. (c), the block rests on the bottom of the beaker. The scale in Fig (a) reads 14 N .

    A
    The tension in the string in (b) is `10 N`.
    B
    The tension in the string in (b) is `7 N`.
    C
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    D
    The reading of the scale in (c) is `24 N`.

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