- It S Easy If You Give It Within 15 Minutes Please 1 (87.1 KiB) Viewed 36 times
3. i. Discuss working of a strain gauge and derive expression for the "gauge factor (G)".A strain gauge has a resistance of 100 2 and the gauge factor of 2.1, of strain is 2 × 10-³. Obtain the change in resistance. (10 Marks) ii. An analog to digital converter (ADC) measures voltages in the range of 0 to 25 V and has 12-bit accuracy. What is the smallest voltage step that the ADC can resolve? (5 Marks) iii. If 3.45 V is applied to a 4-bit successive-approximation-type A/D converter which has a reference voltage of 5 V, what will be the digital output of the ADC? (10 Marks) iv. A 6-bit D/A converter having 320 kn resistances is in LSB position. The converter is designed with weighted resistive network. The reference voltage is 10 V. The output of the resistive network is connected to an OP-AMP with a feedback resistance of 5 kW. What is the output voltage for a binary input of 111010? (10 Marks) (Total 35 Marks)