For type 2 system, the magnitude and phase angle of the term (jω)2 in the denominator, at ω = 0, are respectively

• 0 and - 90°
• 0 and + 90°
• infinity and - 180°
• infinity and + 180°

Correct Answer: infinity and - 180°

Explanation:

If ω = 0, has a magnitude of infinity and phase angle -180°.