Electronics and Communication Engineering (ECE)

i1 , i2 = ?
  • a)
    2.6 A, 1.4 A
  • b)
    2.6 A, -1.4 A
  • c)
    1.6 A, 1.35 A
  • d)
    1.2 A, -1.35 A
Correct answer is option 'D'. Can you explain this answer?

Kulwantkaur answered  •  2 hours ago
ix = i1 - i2
15 = 4i1 -2(i1 - i2) + 6(i1 - i2)
⇒ 8i1 - 4i2 = 15   ..........(i)
-18 = 2i2 + 6(i2 -i1)
⇒ 3i1 -4i2 = 9    ..........(ii)
i1 =1.2 A, i2 = -1.35 A 

When two non - linear systems S1 and S2 are connected in cascade the overall system is
  • a)
    non - linear.
  • b)
    linear.
  • c)
    neither linear nor non linear.
  • d)
    non - linear but stable.
Correct answer is option 'B'. Can you explain this answer?

Manish Rathi answered  •  13 hours ago
Y(t) - Si * S2 = linear
Exponential of any signal as non - linear
logarithm of any signal is non - linear
When two linear systems are connected in cascaded the
system is non - linear
Sim tarty two non linear systems are connected in cascaded then the system is linear

A fair dice is tossed two times. The probability that the second results in a value that is higher than the first toss is:
  • a)
    2/6
  • b)
    1/2
  • c)
    1/18
  • d)
    5/12
Correct answer is option 'D'. Can you explain this answer?

Jaya Karan Surya answered  •  13 hours ago
In the first toss, results can be 1, 2, 3, 4, 5
For 1, the second toss results can be 2, 3, 4, 5, 6
For 2, the second toss results can be 3, 4, 5, 6
For 3, the second toss results can be 4, 5, 6
For 4, the second toss results can be 5, 6
For 5, the second toss results can be 6
So the required probability

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