NATA Mock Test - 10 - JEE MCQ

In Coolidge tube experiment, if applied voltage is increased to three times, the short wavelength limit of continuous X - ray spectrum shifts by 20 pm. What is the initial voltage applied to the tube ?

A washer is made of metal having resistivity 10^–7 Ωm. The washer has inner radius 1 cm, outer radius 3 cm and thickness 1 mm. A magnetic field, oriented normal to the plane of the washer, has the time dependent magnitude B = (2t) tesla/sec. Find the current (in ampere) around the washer

Copper reduces  into NO and NO₂ depending upon concentration of HNO₃ in solution. Assuming  [Cu²⁺] = 0.1M, and P_NO = P_NO2 = 10^–3 bar. At which concentration of HNO₃, thermodynamic tendency for reduction of  into NO and NO₂ by copper is same?

A radioactive material (t_1/2 = 30 days) gets spilled over the floor of a room. If initial activity is ten times the permissible value, after how many days will it be safe to enter the room

 A mixture of all possible stereoisomers from the above structure is subjected to fractional distillation, which of the following statements is correct

Which of the following about SF₄, SOF₄ and COF₂ molecules is correct?

Let a, b and c be positive constants. The value of ‘a’ in terms of ‘c’ if the value of integral   is independent of ‘b’ equals

Let  are three vectors along the adjacent edges of a tetrahedron,  if  and  then volume of tetrahedron is

Let ω be a complex cube root of unity with ω ≠ 1. A fair die is thrown three times. If r₁, r₂ and r₃ are the numbers obtained on the die, then the probability that 

A ray of light travels along a line y = 4 and strikes the surface of a curves y² = 4 (x + y), then equations of the line along which reflected ray travel is

A triangle ABC having vertices A (5, 1), B (–1, –7) and C (1, 4) respectively. If L1 be the line mirror passing through C and parallel to AB, a light ray emanating from point A and goes along the direction of internal bisector of the angle A, which meets the mirror at E and BC at D. Then sum of the area of ΔACE and ΔABC is

Select a figure from amongst the Answer Figures which will continue the same series as

established by the five Problem Figures

Select a figure from amongst the Answer Figures which will continue the same series as

established by the five Problem Figures.

Choose the figure which is different from the rest.

Choose the figure which is different from the rest.

Choose the alternative which is closely resembles the mirror image of the given

combination.

Choose the alternative which is closely resembles the mirror image of the given

combination.

Find out the alternative figure which contains figure (X) as its part.

Find out the alternative figure which contains figure (X) as its part.

Select a suitable figure from the four alternatives that would complete the figure matrix.

Select a suitable figure from the four alternatives that would complete the figure matrix.

Choose a figure which would most closely resemble the unfolded form of Figure (Z).

Choose a figure which would most closely resemble the unfolded form of Figure (Z).

Group the given figures into three classes using each figure only once.

Select the alternative which represents three out of the five alternative figures which when fitted into each other would form a complete square.

Select a suitable figure from the Answer Figures that would replace the question mark (?).