Question

2 AAA-size lithium batteries are connected in series in a flashlight. Each battery has 3.5

volt and 4- Amp-hour capacity. If the flashlight is connected to a light bulb with 10 Ohms

resistance. How long does it take to drain the batteries?

Answer #1

**Concept** - find the energy in each battery and
then find the current through the resistor and hence find the
required time to drain the batteries as shown below***************************************************************************************************

**This concludes the answers. If there is any mistake or
omission, let me know immediately and I will fix
it....**

part 1
A 48 volt battery (DC) is connected in series to a 10
milli-henrie inductor, and a 3 ohm resistor. What is the current in
the circuit, in amps, after 2.1 milli-seconds?
part 2
A 29 milli-henrie inductor and a 3 ohm resistor are connected
without a battery. The initial current in the circuit is 10 amps.
How long does it take, in milli-seconds, for the current to be 3.7
amps?

In a series RC circuit, a battery of 7.30 volts is
connected to the resistor of 467 ohms, the capacitor of 6.71
microfarads, and a switch. The capacitor is initially uncharged.
The switch is closed at time t = 0.
How long does it take for the capacitor to get fully
charged? Answer to four decimal places.

Suppose you have a circuit with a 10 volt battery hooked up to a
100 ohm light bulb and a variable resistor of R ohms. The light
bulb and the resistor can be hooked up in series or parallel. Draw
both these circuits and label them as series or parallel and with
the values of each component.
Now, solve for the current in the light bulb in each of these
circuits for R = 10, 100, and 1000 Ohms.
Given...

1. Three light bulb are connected in series with a 2 battery .
Light Bulb 1 has a resistance of 2 Ohms , Lights bulb B has a
resistance of 4 Ohms , and light bulb C has a resistance a
resistance of 5 Ohms . Which light bulb will be the brightest ?
a) Light Bulb B
b) Light Bulb C
c) Light Bulb A
d) all have the same brightness , since the current in the same
across...

Three resistors are connected in series across a battery. The
value of each resistance and its maximum power rating are as
follows: 5.4Ω and 28.3 W, 33.8Ω and 9.33 W, and 15.1Ω and 12.6 W.
(a) What is the greatest voltage that the battery can have without
one of the resistors burning up? (b) How much power does the
battery deliver to the circuit in (a)?

Three resistors are connected in series across a battery. The
value of each resistance and its maximum power rating are as
follows: 4.2Ω and 22.5 W, 25.6Ω and 13.1 W, and 21.7Ω and 10.4 W.
(a) What is the greatest voltage that the
battery can have without one of the resistors burning up?
(b) How much power does the battery deliver to
the circuit in (a)?

Three resistors are connected in series across a battery. The
value of each resistance and its maximum power rating are as
follows: 5.3Ω and 23.4 W, 41.6Ω and 11.2 W, and 12.7Ω and 10.9 W.
(a) What is the greatest voltage that the battery can have without
one of the resistors burning up? (b) How much power does the
battery deliver to the circuit in (a)?

2. The 60 W incandescent lamp and the 100 W
incandescent lamp are each designed to be connected to a 220 V
cable. Both lamps are connected in series and the string is
connected to a 220 V mains supply. Explain which bulb will glow
brighter.
1. Two conductors with resistances of 10 ohm and 20
ohm are connected in series. and the circuit is connected to a
voltage of 60 v. A. Determine the current flow in each conductor....

Please answer..
Overview:
When a wire is attached to the positive terminal of a power
source, such as a battery, and to the negative terminal of the
battery a potential difference is set across that wire and a
current is generated through that wire. Depending on how much
resistance there is in the wire will affect the amount of current
through that wire. Adding more resistance will further affect the
amount of current. In this experiment you will measure
both the...

1- A 10.0-W resistor and a 20.0-W resistor are connected in
series with a potentiometer and a 9.0-V battery.
What should the potentiometer be set at for a total equivalent
resistance of 50.0 W in this circuit?
a. 10 Ω
b. 20 Ω
c. 30 Ω
d. 50 Ω
2-Batteries are most often connected in
a. series.
b. parallel.
c. both series and parallel.
d. neither series nor parallel.
(i think parallel)
3- A 9.0-V battery delivers a 1.3-A current...

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