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In an electric kettle, water boils in 10 minutes after the kettle is switched on. With the same supply voltage if the water is to be boiled in 8 minutes, should the length of the heating elemnet be increased or decreased ? Explain .

CBSE Class 12 Maths - Most Expected 6 Marks Questions | Application Of Integrals + 3D Geometry

Water boils in an electric kettle in 15 min after being switched on . Using the same main supply , should the length of the heating element be increased or decreased if the water is to be boiled in 10 min ? Why ?

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At a constant temperature what should be the percentage increase in pressure for a 10% decrease in the volume of gas ? .

The average age of an adult class is 40 years.12 new students with an average age of 32 years join the class,thereby decreasing the average by 4 years.The original strength of the class was ( a ) 10 (b) 11 (c) 12 . (d) 15

CBSE Class 12 Maths - Most Expected 6 Marks Questions | Determinants and Application of Derivatives

Q.12 Area of a rectangle is A.If its length is reduced by 10% and its breadth is increased by 10% then which of the following statements is true ?(A) A remains unchanged(B) A is decreased by 1%(C) A is decreased by 0.1%(D) A is increased by 0.1%

Adsorption is accompanied by the evolution of heat. Thus, according to Le Chatelier's principle the amount of surface adsoebed should (i) decrease with increase in temperature (ii) decrease with decrease in temperature (iii) increase with increase in temperature (iv) increase with decrease in temperature

In a class test in English 10 students scored 75 marks, 12 students scored 60 marks, 8 scored 40 marks and 3 scored 30 marks, the mode for their score is