Q.1
The basic unit of measurement for resistance is the:
Q.2
An audio transformer has a turn ratio of 9, What is its impedance ratio?
Q.3
What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?
Q.4
When operating below its resonant frequency, a series RLC circuit has the characteristics of a:
Q.5
The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
Q.6
Which one of the following statements is true?
Q.7
How many protons does the nucleus of a silicon atom contain?
Q.8
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?
Q.9
What is a free electron?
Q.10
To get the Norton current, you have to
Q.11
1 Microfarad is the same as:
Q.12
Which one of the following statements is true for resistance in a parallel circuit?
Q.13
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?
Q.14
Which one of the following phrasers best describes flux density?
Q.15
Which is the most widely used semiconductor?
Q.16
The emitter diode is usually
Q.17
The barrier potential accross each depletion layer is
Q.18
Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?
Q.19
The direction of conventional current flow is:
Q.20
Doubling the operating frequency of a purely inductive circuit:
Q.21
The transistor has a current gain of 175. If the base current is 0.1 mA, what is the collector current?
Q.22
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?
Q.23
What kind of battery is most likely included in a cordless electric knife?
Q.24
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:
Q.25
Which one of the following statements is true?
Q.26

Which one of the following statements best describes magnetic hysteresis?

  • Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet
  • Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
  • Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
  • Hysteresis is most apparent when the core material is saturated
  • None of the above
Q.27

A certain power transformer has a turns ratio ofWhat voltage can you expect at the secondary winding when you applyV to the primary winding?

  • 4.73
  • 0.4 V
  • 24 V
  • 600 V
  • None of the above
Q.28

A dielectric material is:

  • a good conductor
  • a good insulator
  • a poor conductor of electrostatic fields
  • a good conductor of magnetic fields
  • None of the above
Q.29

Which one of the following statements is true for current flowing in a parallel circuit?

  • The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
  • The same current always flows through every part of a parallel circuit
  • The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
  • The total current in a parallel circuit is always less than the smallest amount of current
  • None of the above
Q.30

Which one of the following statements is true for the voltages in a series RC circuit?

  • The total voltage is equal to the sum of the voltages across the resistance and capacitance
  • The voltage always has the same amplitude and phase for every part of the circuit
  • The total voltage is less than the sum of the voltages across the resistance and capacitance
  • The total voltage is greater than the sum of the voltages across the resistance and capacitance
  • None of the above
0 h : 0 m : 1 s