Placement Papers: ISRO Paper on 22nd Apr at Delhi

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helo friends, i appeared for ISRO written examinatiom on 22april, 2007 for the post of Scientist Engineer.

paper was totally technical. Questions which i remembered are as follows:

  1. output resistance of ideal OP AMP is:

    1. 0

    2. 1

    3. infinite

    4. very high ANS: 0

  2. waveguide acts as:

    1. LPF

    2. HPF

    3. BPF

    4. BRF ANS: HPF

  3. quality factor of series RLC ckt. Increases with:

    1. increase in R

    2. decrease in R

    3. doesn, t depends on R

    4. none of these

    ANS: Decrease in R.

  4. energy stored in capacitor is given by:

    1. CV

    2. 0.5CV

    3. CV2

    4. 0.5CV2


  5. CMRR of an OP AMP is given as 80db and Ad is 20000. Value of Acm will be:

    1. 4

    2. 8

    3. 2

    4. 1 ANS: 2

some basic questions were based upon digital electronics, ckt. Analysis, antenna theory, zener doides.