Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test With Answers

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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test

Sr. # Questions Answers Choice
1 Gooch crucible is made of : Brass. Porcelain. Bronze. Gold.
2
3 Which of the following has the same value as i113? i -1 -i 1
4 What is the conjugate of -6 -i? -6 +i 6+i -6 -i 6 -i
5 Which element is the additive inverse of (a, b) in Complex numbers? (a, 0) (0, b) (a, b) (-a, -b)
6 If z1= 2 + 6i and z2= 3 + 7i, then which expression defines the product of z1and z2? 36 + (-32)i -36 + 32i 6 + (-11)1 0, +(-12)i
7 15 15 i -15 i -15
8 z is purely imaginary a is any complex number z is real None of these
9 0 1 -1 None of these
10 If Z1= 1 + i, Z2= 2+3i, then |Z1- Z2| = ?
11 i101= i i<sup>2</sup> -i -1
12 The multiplicative inverse of -3i is 3i -3i -1/3i 1/3 i
13
14 In polar form of complex number r =
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16
17 (7, 9) + (3, -5) = (4, 4) (10, 4) (9, -5) (7, 3)
18 <br>
19 i2 = 1 2 -1 0
20 (a,0) x (c, 0) = (0,ac) (ac, 0) (0,0) (a, c)
21 (a, b) + (-a, -b) = (0,0) (a, b) (-a, -b) (1, 1)
22
23 (a+bi) - (c+di)= (a+b) = (c+d) (a+c) + i(b+d) (a - c) + (c- d)i (a - c)+ (b - d)i
24 i3= -1 i -i 1
25 In (x + iy), y is called as Imaginary part Complex number Real part None of above
26 i =
27 Additive property of inequality Commutative property Additive inverse Additive identity
28 Commutative property of addition Closure property of addition Additive inverse Associative property w.r.t. to addition
29 Rule of quotient of fraction Golden rule of fraction Rule for product of fraction Principle for equality of fraction
30 Principle of equality of Fractions Rule for product of fraction Golden rule of fraction Rule of quotient of Fraction
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