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Runge Kutta Method - Free MCQ Practice Test with solutions, GATE MA Engineering


MCQ Practice Test & Solutions: Test: Runge Kutta Method (5 Questions)

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Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 15 minutes
  • - Number of Questions: 5

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Test: Runge Kutta Method - Question 1

If  and h = 0.2, then solving by fourth order Runge-Kutta method:

Detailed Solution: Question 1

Range-Kutta method (R-K method):
To solve  with condition y(x0) = y0
Let 'h' denotes the interval between equidistant values of x, if the initial values are (x0 , y0), then the first increment in y is computed from the formula given by:
y1 = y0 + Δy
where Δy is the change in y given by

y0 is the intial value of y
y1 is the changed value of y
Calculation:
Given:



y1 = y0 + Δy
y1 = 1 + 0.1959 = 1.1959

Test: Runge Kutta Method - Question 2

Consider the first order initial value problem
y’ = y + 2x – x2, y(0) = 1, (0 ≤ x < ∞) with exact solution y(x) = x2 + ex. For x = 0.1, the percentage diference between the exact solution and the solution obtained using a single iteration of the second-order Runge Kutta method with step size h = 0.1 is

Test: Runge Kutta Method - Question 3

A gradually varied flow profile can be governed by equation  where x is distance and y is the depth of water above the bed level. Which of the following methods can be used for solution?

Detailed Solution: Question 3


As we can see from the above table, the method used for solving an ordinary differential equation is the Runge Kutta method, and the above-given equation, i.e,    for gradually varied flow profile is an ordinary differential equation. 
So, the Runge Kutta method can be used for finding the solution to the above equation.

Test: Runge Kutta Method - Question 4

Consider an ordinary differential equation  If x = xo at t = 0, the increment in x calculated using Runge Kutta fourth order multistep method with a step size of Δt = 0.2 is

Test: Runge Kutta Method - Question 5

Runge-Kutta fourth order method is used to solve the differential equation  If the initial value y(0) = 2 and step-size is 0.1, then the value of k1, k2, k3, and k4 respectively is?

Detailed Solution: Question 5

Working rule to find increment k of y corresponding to an increment h of x by Runge-Kutta method from  is as follows:

Calculation:
Given:
 y(0) = 2 and step-size (h) = 0.1
Ranga-Kutta fourth order equation is given by:
y1=y0+k
where k = 1/6(k1+2k2+2k3+k4) and 

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