Moodle Activity Examples

The larger resistance value observed when you are checking the resistance of a
semiconductor [16].

A waveguide arrangement that resembles a T and uses crystals for coupling the
output to a balanced transformer [18].

A circuit that controls the oscillator frequency (afc) [17].

A tuned circuit that does not pass a specified band of frequencies [9] [16].

A filter that allows a narrow band of frequencies to pass through the circuit.
Rejects or attenuates frequencies that are either higher or lower than the desired band of frequencies [9]
[16].

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 [8] [9] [12] [15].

A type of bolometer characterized by an increase in resistance as the dissipated power rises [16].

The element in a transistor that controls the flow of current carriers [7]. (1) A reference value. (2) A number that is multiplied by itself as many times as indicated by an exponent. (3) Same as radix. (4) The region between the emitter and collector of a transistor that receives minority carriers injected from the emitter. It is the element that corresponds to the control grid
of an electron tube [13].

Similar to a control-grid modulator. The gain of a transistor is varied by changing the bias on its base [12].

A device for converting chemical energy into electrical energy [1].