Differential Equations  MCQs

MCQs of Differential Equations

Showing 131 to 140 out of 145 Questions
131.
If c1, c2, c3, c4, c5, c6 are constants, the order of the differential equation
y = c1cos(x + c2) + c3sin(x + c4) + c5ex + c6 is _____.
(a) 3
(b) 4
(c) 5
(d) 6
Answer:

Option (b)

132.
If the slope of the family of curves of lines is equal to y - intercept, its differential equation is _____.
(a) x+1dydx-y=0
(b) x+1dydx+y=0
(c) dydx=x-1y-1
(d) dydx=x+1y+1
Answer:

Option (a)

133.
The order and degree of family of curves differential equation satisfying y2=2c x+c3 are _____. where c is arbitrary constant.
(a) 1, 1
(b) 2, 1
(c) 1, 3
(d) 1, 4
Answer:

Option (d)

134.
The differential equation satisfying y = xecx (where c is arbitrary constant) is _____.
(a) dydx=yx1-logyx
(b) dydx=yxlogyx+1
(c) dydx=yx1+logyx
(d) dydx=xy1+logyx
Answer:

Option (c)

135.
The integrating factor of the differential equation dydx+y1-xx=1-x is _____.
(a) 1-x1+x
(b) 1+x1-x
(c) 1+x1-x
(d) x1-x
Answer:

Option (c)

136.
The general solution of differential equation dydx=ey+x+ey-x is _____.
(a) e-y=ex-e-x+c
(b) e-y=e-x-ex+c
(c) e-y=ex+ e-x+c
(d) e-y+ ex+ e-x=c
Answer:

Option (b)

137.
The differential equation of family of curves y = e2x(a cosx + b sinx),(where a and b are arbitrary constants.)
(a) y2 - 4y1 + 5y = 0
(b) 2y2 - y1 + 5y = 0
(c) y2 + 4y1 - 5y = 0
(d) y2 - 2y1 + 5y = 0
Answer:

Option (a)

138.
If the general solution of differential equation d2ydx2=e-2x is y = c1e-2x + c2x + c3, then c1 = _____.
(a) 4
(b) 12
(c) 14
(d) None of the above
Answer:

Option (c)

139.
The differential equation of family of circles whose radius is 5 and whose centre lie on y = 2 is _____.
(a) (y - 2)2y'2 = 25 - (y - 2)2
(b) (x - 2)2y'2 = 25 - (y - 2)2
(c) (x - 2)y'2 = 25 - (y - 2)2
(d) (y - 2)y'2 = 25 - (y - 2)2
Answer:

Option (a)

140.
The differential equation of the family of circles passing through origin and whose centre lies on X - axis is _____.
(a) y2=x2+2xydydx
(b) y2=x2-2xydydx
(c) x2=y2+xydydx
(d) x2=y2+3xydydx
Answer:

Option (a)

Showing 131 to 140 out of 145 Questions