Physics 35
a 50 v battery is connected across a 10 ohm resistor and produces 4.5 a
1.1 ohms ( 50/4, 11.1 -10)
a 60 w light bulb and a 100 w light bulb are both connected in parallel to a 120 v which has more current
100w
what is the equivalent resistance of a 30ohm and a 20 ohm resistor
12 ( 30 x 20/ 30+20)
the total resistance of a 10 ohm resistor and a 7 ohm resistor in a series is
17 ohms
A 20 V potential difference is applied across a parallel or 10
2 a ( 20/10)
a 30 v potential difference is applied across a series of a 8 and 3
2.7 a ( 30/11)
the current through two identical light bulbs are both connected to in a series is .25 a the total voltage across both is 120 v
240
two identical resistors in a parallel have an equivalent resistance of 7 ohms
28 ohms
the total resistance of a 6 ohm resistor and a 12 ohm resistor in parallel
4 ohms
a 2 ohm resistor is connected in a series with a 20 v battery
5 a (20/4)
How many 6 ohms resistors must be connected in parallel to create an equivalent resistance of 1 ohm
6
a 60 v potential difference is applied across a series of 10 an 20
6 a ( 60/10)
In order for current to flow in a circuit, you must have
a switch that is open
In order to form an electric circuit, you need to have
all of the above
fuses and circuit breakers are used to
all of the above
in a simple parallel circuit
all of the above
Two lamps, one with a thick filament and one with a thin filament, are connected in parallel. The voltage is greater in the lamp with the
both voltage are same
When one light bulb in a parallel circuit containing several light bulbs burns out, the other light bulbs
burn the same
A closed circuit is a circuit in which charge
can flow
Two lamps, one with a thick filament and one with a thin filament, are connected in series. The current is greater in the lamp with the
current is same
As more lamps are put into a series circuit, the overall current in the circuit
decreases
a 60w light bulb is connected to a 12v car battery
doubles
In order to make a flashlight bulb light up, all you need to do is to run a wire from the positive terminal of a flashlight battery to the center of the bulb's base.
false
a fuse or circuit breaker used in a circuit
false
in a parallel circuit current is the same
false
when connected in a series an electric circuit provides
false
as are lamps are put into parallel
increases
When resistors are put in series next to each other, their overall resistance is
larger than the resistance of any individual resistor
Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have
less resistance
electrical resistance is measured in
none of the above
When one light bulb in a series circuit containing several light bulbs burns out
none of the other bulbs will light up
Electrical devices in our homes are connected in
parallel
When two light bulbs are connected in series, the
same amount of current always flows through each bulb
When resistors are put in parallel with each other their overall resistance is
smaller
which of the following is a device used to either cut off or allow
switch
a short circuit occurs when
the positive wire is connected directly to the negative wire
two electrical devices are connected in a series the total resistance is
the sum
Two lamps, one with a thick filament and one with a thin filament, are connected in parallel. The current is greater in the lamp with the
thick filament
When light bulbs are connected in series, all carry the same current regardless of their resistances.
true
When resistors are arranged in parallel
true
a schematic diagram is a simplified
true
in a series circuit the total voltage drop across is
true
in order to prevent overloading in a circuit
true
in a simple parallel circuit
voltage across each branch is always the same
The symbol used to represent resistance in a schematic diagram is
zig zag line