Online Engineering Continuing Education Courses

New & Old Electronic Glossary

Quiz Questions:

1.	The ability of an antenna to radiate or receive more energy in some directions than in others is called _____________________.

		Directivity
		Diffraction

2.	Accelerating Anode is an electrode charged several thousand volts positive and used to accelerate electrons toward the front of a cathode-ray tube.

		True
		False

3.	___________________ is an electrically excited magnet capable of exerting mechanical force or of performing mechanical work.

		Electromagnet
		Electrical field

4.	The current in an electrical circuit is directly proportional to the electromotive force in the circuit is known as _________________.

		Ohm's Law
		Kirchhoff's Law

5.	Hertz is a spirally wound transmission line used in a traveling-wave tube to delay the forward progress of the input traveling wave.

		True
		False

6.	Magnetic field is defined as a region in which the magnetic forces created by a permanent magnet or by a current-carrying conductor or coil can be detected.

		True
		False

7.	The difference between the highest usable frequency of a device (upper frequency limit) and the lowest usable frequency of the device (lower frequency limit) - measured at the half-power points is called ____________________.

		Bandwidth
		High frequency

8.	____________________ is a region in a semiconductor where essentially all free electrons and holes have been swept out by the electrostatic field which exists there.

		Depletion region
		Demodulator

9.	E-FIELD is an electric field that exists when a difference in electrical potential causes a stress in the dielectric between two points.

		True
		False

10.	_________________ is a term used to describe the total force exerted by an action-at-a-distance phenomenon such as gravity upon matter, electric charges acting upon electric charges, and magnetic forces acting upon other magnets or magnetic materials.

		Field of force
		Electric field

11.	Accelerometer is a device that measures the acceleration to which it is subjected and develops a signal proportional to it.

		True
		False

12.	BEARING Frequency is an ability of radar to distinguish between targets those are close together in bearing.

		True
		False

13.	A circuit that clamps the upper extremity of the output wave-shape to a dc potential of 0 volts is called as a ______________.

		Negative clamper
		Positive clamper

14.	The algebraic sum of the current flowing towards any point in a circuit and the current flowing away from it is zero is called as ____________.

		Kirchhoff's law
		Newton's law

15.	The process of enlarging a signal in amplitude (as of voltage or current) is know as Input Impedance.

		True
		False

16.	Characteristic impedance is the ratio of voltage to current at any given point on a transmission line represented by a value of impedance.

		True
		False

17.	_____________ is the current caused by the relative motion between a conductor and a magnetic field.

		Induced Current
		Eddy Current

18.	Generator is a machine that converts mechanical energy to electrical energy by applying the principle of magnetic induction.

		True
		False

19.	____________ is a filter, used on extremely high-voltage, low-current power supplies and also where the ripple frequency is not critical.

		Capacitor filter
		Dynamic filter

20.	__________ is an acronym for light amplification by stimulated emission of radiation.

		Laser
		Eclipse