ISRO Technician-B Electronic Mechanic Question Paper - 2017 (Set - 1) with Answer Key

ISRO Technician-B Electronic Mechanic Question Paper - 2017 (Set - 1) with Answer Key

6) Three capacitors of value 1microFarade, 2 microFarade and 3 microFarade are connected in series across a 10V DC supply. Which of them will have more amount of charge?

Answer is:

All will have same charge

7) How many 2k x 8 ROM chips would be required to build a 16k x 8 memory system?

Answer is:

8

8) A transformer has a primary to secondary turns ratio of 1:2.50V rms, 50Hz sine wave is applied at primary winding. The peak secondary voltage will be

Answer is:

141.4V

9) A 240 kHz, 10Vpp carrier is amplitude modulated using a 1 kHz sine wave of 3 Vpp. What is the modulation index?

Answer is:

0.3

10) In and amplitude modulated signal, modulating frequency is 10 kHz and modulation index is 0.6. What should be the best suited RC time constant for the envelop detector?

Answer is:

0.02 msec