Q.1
Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?
Q.2
Doubling the number of turns of wire in an inductor:
Q.3
A farad is defined as the amount of capacitance necessary for:
Q.4
If a load resistance is 1 kW, a stiff current source has a resistance of
Q.5
A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff?
Q.6
Which one of the following statements is true for the voltages in a series RC circuit?
Q.7
The knee voltage of a diode is approximately equal to the
Q.8
The total inductance of a series inductor circuit is:
Q.9
When the graph of current versus voltage is a straight line, the device is referred to as
Q.10
A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?
Q.11
What is the capacitive reactance of a 0.1 micro F capacitor that is operating at 1000 Hz?
Q.12
The number of free electrons and holes in intrinsic semiconductor increases when the temperature
Q.13
A battery is a device composed of one or more:
Q.14
Doubling the operating voltage of a purely capacitive circuit:
Q.15
A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?
Q.16
The rms value of a sine waveform is:
Q.17
Which one of the following statements best describes magnetic hysteresis?
Q.18
How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source?
Q.19
The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor?
Q.20
Which one of the following is a direct statement of Ohm's law?
Q.21
A high-pass filter:
Q.22
How many types of flow are there in a semiconductor?
Q.23
Which one of the following devices is most often used for measuring opposition to current flow in a circuit?
Q.24
What form of energy is used to maintain an imbalance of charges between the terminals of a battery?
Q.25
Which one of the following phrases best describes residual magnetism?
Q.26
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?
Q.27
Which one of the following statements best applies to a parallel RLC circuit?
Q.28
The equivalent of 1 micro A is:
Q.29
Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs?
Q.30
Which one of the following phrases most accurately describes a purely inductive circuit?
0 h : 0 m : 1 s