Q1. State, with reasons, whether the following statements are True or False.
- i)) Thevenin's theorem is valid only for resistive networks. (50 words)
- ii)) Impedance matching is the necessary condition for proper operation of any electronic system. (50 words)
- iii)) In practical rectifier circuit, the peak amplitude of the output voltage is always smaller than the input peak amplitude. (50 words)
- iv)) If the gain of an amplifier is 50 dB, its mid band gain equals 25 dB. (50 words)
- v)) By using positive feedback, the gain of an amplifier can be stabilized. (50 words)
- vi)) CMRR of an op-amp determines its highest operating frequency. (50 words)
- vii)) 79XX series voltage regulator IC cannot provide output current more than 10 mA. (50 words)
- viii)) Only the decimal numbers divisible by 8 can be represented by octal system. (50 words)
- ix)) Truth table of a 3-input OR gate is same as that of a 3-input NAND gate. (50 words)
- x)) X and Y inputs of CRO can be used to directly measure the current flowing through a given circuit. (50 words)
Key Points:
- Thevenin's theorem applies to all linear circuits, not just resistive ones.
- Impedance matching is for maximum power transfer, not universally necessary for operation.
- Practical rectifier output peak voltage is always less than input peak due to diode drops.
- Decibel gain is logarithmic; 50 dB is not linearly related to 25 dB.
Answer: