Major Competitive Exams

Q. If the circumradius of triangle ABC is 10 cm and the area is 48 cm², what is the length of the side opposite to angle A?
  • A. 12 cm
  • B. 14 cm
  • C. 16 cm
  • D. 18 cm
Q. If the circumradius R of triangle ABC is 5 cm, what is the maximum area of the triangle?
  • A. 12.5 cm²
  • B. 15 cm²
  • C. 20 cm²
  • D. 25 cm²
Q. If the coefficient of x^k in the expansion of (x + 1)^n is given by C(n,k), what does C(n,k) represent?
  • A. The number of ways to choose k items from n.
  • B. The total number of terms in the expansion.
  • C. The sum of the coefficients.
  • D. The product of the coefficients.
Q. If the concentration of a reactant is tripled in a second-order reaction, how does the rate change? (2023)
  • A. Increases by 3 times
  • B. Increases by 6 times
  • C. Increases by 9 times
  • D. Increases by 12 times
Q. If the concentration of Cu²⁺ in a cell is increased, what happens to the cell potential?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. If the concentration of reactants is increased in a system at equilibrium, what will happen to the position of equilibrium?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on temperature
Q. If the coordinates of a point are (x, y) and it lies on the line 2x + 3y = 12, what is the value of y when x = 2?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If the coordinates of a point are (x, y) and it lies on the line 3x + 4y = 12, what is y when x = 0?
  • A. 3
  • B. 4
  • C. 2
  • D. 0
Q. If the coordinates of point A are (1, 2) and point B are (4, 6), what is the length of AB? (2023)
  • A. 5
  • B. 4
  • C. 3
  • D. 6
Q. If the coordinates of point C are (5, 5) and point D are (5, 10), what is the length of CD? (2021)
  • A. 5
  • B. 10
  • C. 15
  • D. 20
Q. If the coordinates of point C are (5, 5) and the slope of the line is 1, what is the equation of the line? (2021) 2021
  • A. y = x
  • B. y = 5
  • C. y = 2x - 5
  • D. y = x + 5
Q. If the coordinates of points A and B are (1, 2) and (3, 4) respectively, what is the distance AB?
  • A. 2√2
  • B. √8
  • C. 2
  • D. 4
Q. If the coordinates of points A and B are (1, 2) and (4, 6) respectively, what is the distance AB?
  • A. 5
  • B. 4
  • C. 3
  • D. 2
Q. If the coordinates of the vertices of a triangle are (1, 1), (4, 5), and (7, 2), what is the perimeter of the triangle?
  • A. 12
  • B. 14
  • C. 16
  • D. 18
Q. If the coordinates of the vertices of a triangle are (1, 2), (3, 4), and (5, 2), what is the perimeter of the triangle?
  • A. 8
  • B. 10
  • C. 12
  • D. 14
Q. If the coordinates of the vertices of a triangle are (1, 2), (4, 6), and (7, 2), what is the perimeter of the triangle?
  • A. 12
  • B. 14
  • C. 16
  • D. 18
Q. If the coordinates of the vertices of a triangle are A(1, 1), B(4, 5), and C(7, 2), what is the area of the triangle?
  • A. 10
  • B. 12
  • C. 14
  • D. 16
Q. If the cost function is C(x) = 3x^2 + 12x + 5, find the minimum cost. (2020)
  • A. 5
  • B. 8
  • C. 12
  • D. 10
Q. If the cost function is C(x) = 3x^2 + 12x + 5, find the minimum cost. (2020) 2020
  • A. 5
  • B. 8
  • C. 12
  • D. 10
Q. If the cost function is C(x) = 5x^2 + 20x + 100, find the minimum cost. (2020)
  • A. 100
  • B. 120
  • C. 140
  • D. 160
Q. If the critical angle for a certain material is 30°, what is the refractive index of that material?
  • A. 1.00
  • B. 1.15
  • C. 1.73
  • D. 2.00
Q. If the critical angle for a certain material is 45°, what is the refractive index of that material?
  • A. 1.41
  • B. 1.00
  • C. 1.73
  • D. 0.71
Q. If the cross-sectional area of a wire is doubled, how does its resistance change?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Increases four times
Q. If the cross-sectional area of a wire is doubled, what happens to its resistance?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Increases four times
Q. If the current flowing through a resistor is 2A and the voltage across it is 6V, what is the resistance? (2022)
  • A.
  • B.
  • C.
  • D. 12Ω
Q. If the current in a circuit is 5 A and the resistance is 2 ohms, what is the power consumed in the circuit?
  • A. 10 W
  • B. 25 W
  • C. 5 W
  • D. 2.5 W
Q. If the current in a circuit is doubled while the resistance remains constant, what happens to the voltage?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the current in a circuit is halved, what happens to the power consumed by the circuit?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the current in a circuit is split into two branches with resistances R1 = 2Ω and R2 = 4Ω, what is the current through R1 if the total current is 6A?
  • A. 2A
  • B. 3A
  • C. 4A
  • D. 6A
Q. If the current in a circular loop is doubled, how does the magnetic field at the center of the loop change?
  • A. It remains the same
  • B. It doubles
  • C. It quadruples
  • D. It halves
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