Resistors
What type of fixed resistor is made from a compound of Carbon graphite and resin bonding material?
Composition Carbon
How is resistance determined for metal film resistors
by type of metal used to form the film
What color used as the multiplier band means to divid the combined first two numbers by 10?
Gold band
For most electrical circuits, the voltage level may very how much from the rated value
1%
What is the voltage test range of most Megohmmeters?
50V to 5000V
A resistor whose values can be varied over a range of values is called:
A variable resistor
Why are metal film resistors better than carbon resisors
Because their value doesn't change with age and their tolerance is better
What is most common type fixed resistor?
Composition carbon
What type resistor can only have one ohmic value?
fixed
The voltage is a series circuit?
is divided across the circuit. All used
A potentiometer is a:
variable resistor
Why use carbon film resistors?
Less expensive to make and can have a higher tolerance rating than composition carbon
What type of fixed resistor is made by applying a film of metal to a ceramic rod in a vacuum?
Metal film
What type of fixed resistor is made by combining metal with glass and then applying it to a ceramic base as a thick film?
Metal glaze
How should Tubular wire-wound resistors be mounted? Why?
Mounted vertically because it increases airflow and heat dissipates at a faster rate
What type of resistor operates by moving a wiper arm with a screw of some number of turns?
Multiturn variable. Generally 3 to 10 turns
What is another term for a variable resistor?
Potentiometer
The resistance of wire wound resistors is determined by:
The type material used to make it, the diameter of the wire and the length of the wire
The--- of a resistor indicates the plus and minus limits of a resistors ohmic value
Tolerance
What is indicated by the fourth color band on a resistor?
Tolerance
Which fixed resistor can operate at higher temperature than the others?
Wire-Wound
What type resistors are generally used when a high power rating is needed?
Wire-wound
A variable resistor with two terminals is called
a Rheostat
The voltage in a parallel circuit?
stay the same
What are variable resistors used for?
to adjust the current in a circuit to a certain value
The three types of fixed resistors are:
Composition carbon, Metal film and Wire wound