QUESTION 6 (a) The bar shown in Figure Q2(a) is subjected to tensile load of 150 Kn. If the stress in the middle portions is limited to 160 N/mm², determine the diameter of the middle portion. Find also the length of the middle portion if the total elongation of the bar is to be 0.25 mm. E E = 2.0 + 105N/mm². (12 marks) 150 KN 10 cm DIA 10 cm DIA 150 KN 45 cm Figure Q6(a) (b) A brass bar, having cross-section area of 900 mm², is subjected to axial forces as shown in Figure Q2(b), in which AB = 0.6 m, BC = 0.8 m, and CD = 1.0 m. Find the total elongation of the bar. E = 1.0 + 105N/mm2 . (8 marks) Page 4 of 5 B D 40 KN 70 KN 20 KN 10 KN Figure Q6(b) (TOTAL = 20 MARKS)

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Step 1 of 8

Given circuit diagram is

Step 2 of 8

Given parameters are,

,

,

Bandwidth,

,

From the given circuit we have

, and

Step 3 of 8

(a)

The Bandwidth is,

Since,,

Step 4 of 8

Time constant, 

Step 5 of 8

The RC circuit time constant is

Step 6 of 8

(b)

Step 7 of 8

(c)

Output voltage,

and

Maximum voltage gain, 

where

Step 8 of 8

The maximum gain is