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JEE Main Test 128
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JEE Main Test 128
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  • Question 1/10
    4 / -1

    If sin A, sin B and cos A are in GP, then the roots of χ2 + 2χ cot B + 1 = 0 are always

    Solutions

     

  • Question 2/10
    4 / -1

    Two masses M and M/2 are joined together by means of light inextensible string passed over a frictionless pulley as shown in the figure. When the bigger mass is released, the small one will ascend with an acceleration of

    Solutions

     

  • Question 3/10
    4 / -1

    The work done by a force acting on a body is as shown in the graph. The total work done in covering an initial distance of 20 m is

    Solutions

     

  • Question 4/10
    4 / -1

    The sum of the integers from 1 to 100 which are divisible by 3 and 5, is

    Solutions

     

  • Question 5/10
    4 / -1

    The value of 21/4 . 41/8 . 81/16 ... ∞ is

    Solutions

     

  • Question 6/10
    4 / -1

    The wavelength X. = 5.5 × 10-7m when temperature of the sun is 5500 K. If the furnace has wavelength λm equal to 1 is 10-7m, then temperature of furnace is

    Solutions

     

  • Question 7/10
    4 / -1

    The amount of heat energy radiated by a metal at temperature T is E . When the temperature is increased to 3 T , energy radiated is

    Solutions

     

  • Question 8/10
    4 / -1

    A ball is made of a material of density ρ where ρoil <ρ < ρwater with ρoil and ρwater representing the densities of oil and water respectively. The oil and water are immiscible. If the above ball is in equilibrium in a mixture of this oil and water, which of the following pictures represents its equilibrium position?

    Solutions

    Option (2) is correct.

    Because, the oil is less dense than water.The molecules that make up the oil are larger than those that make up water. So, they cannot pack as tightly together as the water molecules. They take up more space per unit area and are less dense. So,it will sink through oil but will not sink in water.

     

  • Question 9/10
    4 / -1

    The remainder left out when 82n – (62)2n+1 is divided by 9, is

    Solutions

     

  • Question 10/10
    4 / -1

    Solutions

     

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