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In 1899, the study of radioactivity was taken up by Ernest Rutherford. He placed a little radium at the bottom of a small lead box and subjected the rays that emerged from it to the action of a very strong magnetic field at right angles to their direction. He found that the rays separated into thr..

Emission of a and b -rays bring some changes in the nucleus of the atom and the new element formed as a result of these charges is called daughter elemen..

Find α : β => 32 : 11 or 19 : 32 or 23 : 19 or 32 : 19..

If (1 + tan α )(1 + tan β ) = 2 then α + β = => 60° or 30° or 45° or 90°..

Beta rays are made up of streams of negatively charged particles similar to electrons. Thus, - particle has a unit negative charge and a negligible mass. They are electrons. Hence, - particle is represented as -1 e 0 . They affect photographic plate. They get deflected to the..

If α > 0, β > 0, γ > 0 and α + β + γ = π 2 and cot α , cot β , cot γ are in arithmetic progression, then find the value of cot α cot γ. => 2cot² &..

If α , β are the roots of 9 x ² - 10 x - 19 = 0, then find the equation whose roots are α ², β ². => 81 x ² + 442 x + 361 = 0 or 81 x ² - 442 x + 361 = 0 or 81 x ² - 442 x - 361 = 0 or 81 x ² + 442 x - ..

Select the correct statement(s). I. The probability of commiting a type I error is denoted as α II. The probability of commiting a type II error is denoted as β III. A type I error occurs if one rejects the null hypothesis when it is true. IV. The level of significanc..

If cos ( α + β ) = 3 5 and sin ( α - β ) = 12 13 , find tan 2 α . => 56 33 or 33 56 or - 56 33 or - 33 56..

If α and β are the roots of the quadratic equation ax 2 + bx + c = 0, then find the value of 1 a α + b + 1 a β + b . => b a c or 1 b c or a b c or c a b..