The average resistance force is
the change in momentum divided by the time required to stop the bullet
. The distance covered under constant acceleration is 1/2 a* t^2. The average acceleration is the change in velocity divided by the time.
How do you find the resistance of a resistor?
Resistance is measured in ohms and your length and area are measured in meters. All circuits follow Ohm’s Law that tells you the voltage of a circuit is equal to the current multiplied by the resistance, or V = IR in equation form, with
R = V / I
.
How do you calculate resistance in a parallel circuit?
The sum of the currents through each path is equal to the total current that flows from the source. You can find total resistance in a Parallel circuit with the following formula:
1/Rt = 1/R1 + 1/R2 + 1/R3 +.
.. If one of the parallel paths is broken, current will continue to flow in all the other paths.
What is resistance in series and parallel?
In a series circuit, the output current of the first resistor flows into the input of the second resistor; therefore, the current is the same in each resistor. In a parallel circuit, all of the resistor leads on one side of the resistors are connected together and all the leads on the
other side
are connected together.
What is the formula for resistance?
Resistance has units of ohms (Ω), related to volts and amperes by
1 Ω = 1 V/A
. There is a voltage or IR drop across a resistor, caused by the current flowing through it, given by V = IR.
How do you solve resistance problems?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law:
R = V / I
. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance R
T
= 9 volts / 3 amps = 3 Ω.
What is the resistance of a?
Rearrange V = IR to solve for resistance:
R = V / I (resistance = voltage / current)
. Plug the values you found into this formula to solve for total resistance. For example, a series circuit is powered by a 12 volt battery, and the current is measured at 8 amps.
What is difference between resistance and resistor?
Resistance is the property of a conductor, which determines the quantity of current that passes through it when a
potential
difference is applied across it. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.
How do you calculate color code resistance?
The formula for the three-band resistor color code is – 1st digit. 2nd digit.
third digit x Multiplier = 1.0. 3 X100 = 10.3-kilo ohm ±5% 100 ppm/
o
c
.
What do you mean by resistance in series?
Resistors are said to be in series
whenever the current flows through the resistors sequentially
. Consider Figure 6.2.2, which shows three resistors in series with an applied voltage equal to. . Since there is only one path for the charges to flow through, the current is the same through each resistor.
What is the resistance of two resistors in parallel?
Two identical resistors in parallel have an
equivalent resistance half the value of either resistor
. The current splits equally between the two.
Does resistance add in parallel?
Answers: As
more and more resistors are added in parallel
to a circuit, the equivalent resistance of the circuit decreases and the total current of the circuit increases. Adding more resistors in parallel is equivalent to providing more branches through which charge can flow.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as
I = V/R
. The SI unit of current is Ampere (Amp).
What is effective resistance between A and B?
therefore the effective resistance between A and B is
10Ω
What are the factors of resistance?
- material, eg copper, has lower resistance than steel.
- length – longer wires have greater resistance.
- thickness – smaller diameter wires have greater resistance.
- temperature – heating a wire increases its resistance.
What causes resistance?
An electric current flows when electrons move
through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.
