ISRO Electrical Engineering (EE) 2023 - Question 67

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The input impedance of CRO is approximately

  • A. 0 Ω
  • B. 0.1 kΩ
  • C. 10 kΩ
  • D. 1 MΩ

Answer: D. 1 MΩ

Explanation: Standard cathode ray oscilloscope (CRO) vertical input impedance is typically 1 MΩ shunted by 15–30 pF capacitance.

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