ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

16) Resistance of a galvanometer is 0.5 Ohm and full scale deflection corresponds to 10 mA. What is the shunt resistor required to increase the range of the instrument to 1 A.

Answer is:

(5/990) Ohms

17) Temperature coefficient of resistance of a material is 0.005 Ohm/Degree centigrade. At 20 Degree centigrade, the resistance of a wire made up of this material is 1 Ohm. At what temperature the resistance will become 2 Ohm.

Answer is:

220 Degree Centigrade

18) Three 1.5 V cells each having internal resistance 10 Ohm are connected to this battery. What is the current through this circuit?

Answer is:

0.1 A

19) A 10 Ohm resistor and 15 Ohm resistor are connected in series to a 2V cell. The voltage across the 10 Ohm resistor is measured as 2V. Which of the following is a possible cause?

Answer is:

15 Ohm resistor is short circuited

20) A constant current of 2 mA charges a 20 microFarade capacitor for 2 s. Which of the following is true for the charging of the capacitor.

Answer is:

Capacitor voltages increases linearly from 0V to 200V

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