Sample Questions for Practice for SBI Exam

1. Reactive current through the inductive load produces-
a) Magnetic field
b) Electric field
c) Super magnetic field
d) None

2. When a piece of copper and another of germanium are cooled from room temperature to 800 K then the resistance of -
a) each of them increases
b) each of them decreases
c) copper increases and germanium decreases
d) copper decreases and germanium increases

3. A capacitance transducer has two plates of area 5 cm2 each separated by an air gap of 2mm. Displacement sensitivity in pF /cm due to gap change would be -
a) 11.1
b) 44.2
c) 52.3
d) 66.3

4. The critical angle in degrees, for an electromagnetic wave passing from Quartz (m = m0, Î=4Îo) into air is-
a) 15
b)30
c)45
d)90

5. When an RC driving point impedance function has zeros at s= -2 and s=-5 then the admissible poles for the function would be –
a) s = 0; s = -6
b) s = -1; s = -3
c) s = 0; s = -1
d) s = -3; s = -4

6. A capacitor used for power factor correction in single- phase circuit decreases –
a) the power factor
b) the line current
c) Both the line current and the power factor
d) the line current and increases power factor

7. The unit of inductance is –
a) ohm
b) inductive reactance
c) inducta
d) Henry

8. Which type of by-pass capacitor works best at high frequencies –
a) electrolytic
b) mica
c) ceramic
d) plexiglass

9. The usual value of the surge impedance of a telephone line is –
a) 600 W
b) 500 W
c) 75 W
d) none

10. Telemetering is a method of –
a) counting pulses, sent over long distances
b) transmitting pictures from one place to another
c) transmitting information concerning a process over a distance
d) None