Circuits and Circuit elements
two resistors and a battery are wired in series circuit. One resistor has twice the resistance of the other resistor. What is true about the voltage across the two resistors?
1/3 of the battery voltage is across the lower value resistor
six resistors are wired in a parallel circuit. What is the voltage across each resistor in the circuit if the first resistor is connected to a 24 V battery?
24 V
a battery is used to supply power to portable MP3 player. If the terminal voltage across the battery is 4.5 V, what od the potential difference across the MP3 player?
4.5 V
five resistors are wired as shown in the figure above. If the current in the 4.7 R resistor is 0.44 A, what is the terminal voltage of the battery?
4.54V
three resistors are wired in parallel with a battery. Two of the resistors have resistances of 38.7 R, and 89.5 R. The current in the 38.7 R resistor is 0.155 A and the total circuit is .250 A. What is th resistance of the third resistor?
R3= 214 R
which of the schematics shown above conducts electricity through the lamp?
a and c
what is a load?
a bulb or the resistor
what distinguishes a parallel from a series circuit?
a parallel circuit always has more than one current path
what is a schematic diagram?
a picture of the circuit
a short circuit is..
both a and c, potentially hazardous and a circuit without a load that presents little resistance to electron
Your have three 100 R resistors available. How would you connect these three resistors to produce a 150 R equivalent resistance? You must use all of the resistors.
connect one resistor in series with two resistors parallel
a circuit breaker is designed to limit the amount of... in a circuit
current
a load in a circuit
dissipates energy
the total difference across the ten batteries that supply power to a portable two way radio is 12 V. If each battery supplies an equal portion of the potential difference, what is the potential difference across each battery and what is the potential difference across the radio?
each battery is 12 V. 12V across the radio
A circuit is constructed as follows: 4 resistors in parallel connected in series with 3 resistors in parallel connected in series with two resistors in parallel. All of the resistors have the same value. How does the equivalent resistance of this circuit compare to the resistance of a single resistor?
equivalent res. is greater than a single resistor
which of the following devices is always connected in series with a household circuit?
fuse
three lamps are arranged as shown above. Which single lamp must burn out to cause all the maps to go out?
lamp 2
in any complex resistance circuit, the current through any resistor in the circuit is always....
less than or equal to the total circuit current
the current through one resistor in a parallel resistor circuit is always...
less than the total current in the circuit
the symbols in the digram above indicate
one battery, three lamps, and one open switch
a parallel circuit is composed of any number of resistors all of equal value. What simple process ca you use to determine the equivalent resistance of such a circuit?
r/n resistor/ number of resistor
several resistors are wired in a circuit so that there is a single path for the flow of electric current. What type of circuit is this?
series circuit
which is correct regarding the terminal voltage of a battery?
terminal voltage is always less than the emf of the battery
four resistors having equal values are wired as a parallel circuit. How does the equivalent resistance of the circuit compare to the resistance of a single resistor?
the equivalent res. is 1/4 the res. value of a single res.
five resistors are wired in a series circuit. How does the equivalent resistance of the circuit compare to the resistances of the individual resistors?
the equivalent resistance is greater than any single resistance
the part of a circuit that converts electrical energy to other forms of energy is
the load
You want to determine the current in a complex circuit. Which piece of info will be least helpful in making your answer?
the number of devices in the circuit
Because household devices are connected in parallel in a circuit, ... as new devices are connected.
the potential difference remains the same
several resistors are wired in series. What is true about this circuit?
the to a circuit current is the same as the current through any one of the resistors
