Q.1
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm?
Q.2
Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?
Q.3
Which one of the following statements is true?
Q.4
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?
Q.5
Current can flow through a normally open push button switch as long as:
Q.6
Doubling the operating frequency of a purely capacitive circuit:
Q.7
A device that converts thermal energy to electrical energy is called a:
Q.8
How much power is being dissipated by a 1000 W resistance that has 25 V applied to it?
Q.9
How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?
Q.10
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?
Q.11
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W?
Q.12
The nucleus of the copper atom contains how many protons?
Q.13
Which one of the following statements is true for the impedance of a series RC circuit?
Q.14
If a transistor operates at the middle of the load line, an increase in the current gain will move the Q point
Q.15
Which one of the following statements is true for the voltages in a series RL circuit?
Q.16
The core of an electromagnet is said to be in saturation when:
Q.17
Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?
Q.18
The equivalent of 1 megohms is:
Q.19
Which one of the following statements is true for voltage in a series circuit?
Q.20
A basic capacitor is composed of:
Q.21
What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding?
Q.22
What is the inductive reactance of a 0.1-H coil that is operating at 1000 Hz?
Q.23
As the temperature increases, the current gain
Q.24
Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?
Q.25
Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff?
Q.26
Which one of the following devices is most often used for measuring electrical potential difference?
Q.27
The north pole of a magnet is the one:
Q.28
A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?
Q.29
Which one of the following is a statement of KirchhofFs voltage law?
Q.30
Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?
0 h : 0 m : 1 s