Tricky Equivalent Resistance Problems

November 06, 2024 Post a Comment

Tricky equivalent resistance problems

The equivalent resistance is the algebraic sum of the resistances (Equation 10.3. 2): RS=R1+R2+R3+R4+R5=20Ω+20Ω+20Ω+20Ω+10Ω=90Ω. The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance: I=VRS=9V90Ω=0.1A.

How do you find the equivalent resistance of A complicated circuit?

So we can use this formula to get the answer it's going to be 1 over r1 plus 1 over r2 plus 1 over

How do you find the equivalent resistance of A Class 12?

Equivalent resistance for the resistors connected in series is given by simply adding the values of resistance R=R1+R2+… Equivalent resistance for the resistors connected in parallel is given by adding the reciprocals of resistances 1R=1R1+1R2+…

What are some real life applications of resistors?

Because of the nature of generating heat when conducting current, resistors are used in a heater, toaster, microwave, electric stove, and many more heating appliances. In a light bulb, the metal filament glows white-hot due to the very high temperature produced from the resistance when electricity is passed through it.

How do you find the equivalent resistance in A parallel combination?

How do you calculate two resistors in parallel? Take their reciprocal values, add the two together and take the reciprocal again. For example, if one resistor is 2 Ω and the other is 4 Ω, then the calculation to find the equivalent resistance is 1 / (1/2 + 1/4) = 1 / (3/4) = 4/3 = 1.33.

What is the equivalent resistance between A and B class 10?

Their equivalent resistance will be, RAB=2r3.

How do you calculate complex resistance?

So we can use this formula to get the answer it's going to be (1/R1 + 1/R2 + 1/R3)-1. So that's (1/ 4 + 1 / 6 + 1 / 8 )-1 and so for this circuit the equivalent resistance is 1.846 ohms and so that's the answer.

How do you find the unknown resistor in a series circuit?

Calculating Resistance of Unknown resistor, total current and voltage across each resistor

- Resistance of R2. Since it is given that total power is 60 watts, and the series circuit has 120v, then we can calculate total resistance to be RT = (120*120)/60 = 240 ohms.
- Current in the circuit. ...
- Voltage across each resistor.

How do you solve any resistors in series and parallel combination circuit problems in physics?

So notice that these three resistors are in series with each other. And so the equivalent resistance

Which resistor gets the most current?

The smallest resistance gets the most current.

What is the equivalent resistance of two 10 ohm resistors in parallel?

Hence total resistance will be 5 ohm.

How do you calculate Req in a circuit?

To calculate series resistance, which you should use when connecting the "out" side of one resistor to the "in" side of another in a circuit, use the formula Req = R1 + R2 + . Rn. In this formula, n equals the number of resistors in a series.

Is a light bulb a resistor?

The reason a light bulb glows is that electricity is forced through tungsten, which is a resistor. The energy is released as light and heat. A conductor is the opposite of a resistor.

Can I use a fuse as a resistor?

A fuse can be used as a resistor. There are even fusible resistors, which act as a resistor with a definite value but they also act as a fuse on overcurrent. A resistor limits current by its value of resistance measured in ohms. A fuse limits overcurrent damage by opening the circuit above a certain current value.

Is a battery a resistor?

A battery can be thought of as a perfect voltage source with a small resistor (called internal resistance) in series. The electric energy density produced by the chemistry of the battery is called emf, but the amount of voltage available from the battery is called terminal voltage.

How many resistances are possible with two equal resistors?

Answer: There is 2 combinations are possible. The combination number of two equal resistors is 2.

What is the total resistance if three resistances of 4 ohms 6 ohms and 8 ohms respectively are connected in parallel?

Answer: Minimum resistance is obtained by connecting all three resistances in parallel => 1/R =1/4+1/6+1/8 =>1/R = 6/24+4/24+3/24 => 1/R = 13/24 => R =24/13 ohm .

What is the equivalent resistance between the points a and B?

Hence, The equivalent resistance between points A and B is 85(R)

What is the equivalent resistance between A and D?

Now all the resistance between the points A to D becomes in series, Hence, we can add all of them and get the final equivalent resistance. Hence, we can conclude that option (C) R=30Ω is the correct answer.