-
According to Ohm’s law, what happens to circuit current if the applied voltage (a) increases, (b)decreases?
a) Current increases (b) Current decreases
-
According to Ohm’s law, what happens to circuit current if circuit resistance (a) increases, (b)decreases?
(a) Current decreases (b) Current increases
-
6.What is the equation used to find circuit resistance if voltage and current values are known?
R= E/I
-
9.What is the term applied to the rate at which a mechanical or electrical force causes motion?
Power
-
10.How can the amount of current be changed in a circuit?
By changing the circuit resistance or the voltage of the power source.
-
14.What is the power used in a circuit that has 10 amperes of current through a 10-ohm resistor?
1 kilowatt.
-
27.What is an open circuit?
A circuit where there is no longer a complete path for current flow.
-
28.What is a short circuit?
An accidental path of low resistance which passes an abnormally high amount of current.
-
29.Why will a meter indicate more voltage at the battery terminal when the battery is out of a circuit than when the battery is in a circuit?
The internal (source) resistance of the battery will drop some of the voltage.
-
30.What condition gives maximum power transfer from the source to the load?
When the load resistance equals the source resistance.
-
39.What term identifies a single resistor that represents total resistance of a complex circuit?
Equivalent resistor or Req.
-
40The total power in both series and parallel circuits is computed with the formula: PT = P1 + P2+P3 +...Pn. Why can this formula be used for both series and parallel circuits?
In both cases all the power used in the circuit must come from the source.
-
46.What is the effect on total resistance and total current in a circuit if an open occurs in (a) a parallel branch, and (b) in a series portion?
(a) Total resistance increases, total current decreases (b) Total resistance becomes infinite, total current is equal to zero
-
47.What is the effect on total resistance and total current in a circuit if a short occurs in (a) a parallel branch, and (b) in a series portion?
- (a) Total resistance decreases, total current increases (b) Total resistance decreases, total current
- increases
-
48.If one branch of a parallel network is shorted, what portion of circuit current flows through the remaining branches?
None
-
49.What information must be known to determine the component values for a voltage divider?
The source voltage and load requirements (voltage and current).
|
|
