1. Give the opposite word for pulchritude ?

a) antipathy              b) unsightliness                  c) inexperience                  d) languor

2. Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will-

a) Amplify the noise as much as the signal

b) Reduce the noise

c) Increase the noise

d) Not effect the noise

3. A single phase CSI has capacitor C as the load. For a constant source current, the voltage across the capacitor is ?

a) square wave               b) triangular wave                   c) step function                          d) pulsed wave

4. The term used to denote a static device that converts ac to dc, dc to ac, dc to dc or ac to ac is ?

a) Converter system              b) Inverter                c) Chopper              d) Thyristor

5. Strain gauge is ?

a) not a transducer              b) an active transducer                 c) not an electronic instrument                 d) none

6. When an antenna of input resistance 73 ohm is connected to a 50-ohm line and if the losses are ignored then it?s efficiency will be nearly

a) 0.19             b) 0.81               c) 0.97                d) 1.19

7. For a transmission line, the characteristic impedance with inductance 0.294mH/m and capacitance 60pF/m is ?

a) 49w                  b) 60w                  c) 70w                   d) 140w

8. The value of r when a transistor is biased to cut off is ?

a) 0.5                   b) 0                       c) 1.0                      d) 0.8

9. In any atom the potential energy of an orbiting electron is ?

a) always positive

b) always negative

c) sometime positive, sometime negative

d) numerically less than its kinetic energy

10. The Maximum spectral response of the germanium and silicon is in the ?

a) infrared region                   b) ultraviolet region                c) visible region                  d) x-ray region

11. The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to ?

a) Polarization                b) Conductivity              c) Structural homogeneties                    d) Ionization

12. When an NPN transistor is properly biased then most of the electrons from the emitter ?

a) recombine with holes in the base

b) recombine in the emitter itself

c) pass through the base to the collector

d) are stopped by the junction barrier

13. When the graph of a network has six branches with three tree branches then the minimum number of equations required for the solution of the network is ?

a) 2              b) 3                  c) 4                  d) 5

14. When a dipole antenna of l/8 length has an equivalent total loss resistance of 1.5 W then the efficiency of the antenna is

a) 0.89159 %                   b) 8.9159 %                  c) 89.159 %                  d) 891.59 %

15. Which one of the following is not a transducer in the true sense ?

a) Thermocouple                   b) Piezoelectric pick up                       c) Photo voltaic cell                     d) LCD