- To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
- To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
- To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
- To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)

**Table of Contents**show

## How do you solve circuit problems in physics?

## What is a DC circuit in physics?

In electricity: Direct-current circuits. The simplest direct-current (DC) circuit consists of a resistor connected across a source of electromotive force. The symbol for a resistor is shown in Figure 15; here the value of R, 60Ω, is given by the numerical value adjacent to the symbol.

## What are the formulas in the DC series circuit?

- V = V 1 + V 2 + V 3.
- V = I R 1 + I R 2 + I R 3. If R is the total circuit resistance, then.
- I R = I R 1 + I R 2 + I R 3.
- R = R 1 + R 2 + R 3. The total effective resistance is equal to the sum of all individual resistances.
- I = I 1 + I 2 + I 3. I = V R 1 + V R 2 + V R 3.

## What happens when you break a parallel circuit try it out in the SIM if you need to !)? How would this property be useful when designing circuits?

2. What happens when you break a parallel circuit (try it out in the sim if you need to!)? How would this property be useful when designing circuits? If you break a parallel circuit the circuit will still work but only that one bulb that broke is out.

## What does i Q t mean?

Q = I × t. This is when: charge (Q) is measured in coulombs (C) current (I) is measured in amps (A) time (t) is measured in seconds (s)

## What is an example of a DC circuit?

The most basic example of a DC circuit is a flashlight where we only connect a battery, a switch, and a light bulb or LED.

## Why DC current is not used in homes?

Power loss during transmission is more in direct current as compared to alternating current. For the same value of voltage DC is more dangerous than AC. It will more troublesome if touched because the voltage does not go through zero.

## Which way does DC current flow?

This flow of electrons is called Electron Current Flow. Therefore, electrons actually flow around a circuit from the negative terminal to the positive.

## How do you reduce 9V to 3v?

To reduce a 9V battery to 3.3 volts, use a zener diode, such as a 1N746 or a 1N4728A. Choose the appropriate one based on how much power it can dissipate. A 1N4728A has a 3.3-volt and a 1 W power rating. It can supply, on average, a stable 3.3 volts to a circuit or another component.

## How do you solve a parallel circuit in DC?

## How do you find the current in a series circuit in DC?

We can calculate the total current for the circuit by dividing the voltage by the resistance. If we connect a 10 ohm resistor to a 9V battery, 9V ÷ 10 ohm gives us 0.9A. If we added another 5 ohm resistor to the circuit, that gives us 15 ohms resistance, so 9V ÷ 15 ohm =0.6A. 9V ÷ 20 Ohms = 0.45A.

## What are the 3 equations for power?

- P = E t.
- P = W t.
- P = V 2 R.

## How do you get 3 phase power to your house?

To upgrade to 3-phase, you need to make an application to your DNO, but your electrician can handle the application. The cabling supplying your property needs replacing and a three-phase distribution board with RCD protection needs installing to balance the various loads.

## How do you find the voltage drop in a DC circuit?

For cables operating under dc conditions, the appropriate voltage drops may be calculated using the formula. 2 x route length x current x resistance x 10¯³. = 10.5 volts for 3 phase working or 0.025 x 240 = 6.0 volts for single phase working.

## What size alternator do I need for 3000 watt amp?

To obtain 3000 Watts AC at 120 Volts from an inverter, you must replace your 100 AMP alternator with an expensive 250 AMP alternator and install MULTIPLE heavy duty batteries. In addition, 50 more amps are required to operate your vehicles accessories, lights, flashers etc.

## How many amps does a 400 watt solar panel put out?

In the specifications of your solar panel, you’ll find the circuit current and circuit voltage at their maximum values. Generally, a 400-watt panel will be 40 Volts and 10 Amps, equal to 400 watts!

## How much power can a 400 watt solar panel produce?

In real-world conditions, a 400-watt solar panel will produce, on average, between 1,200 watt-hours (1.2 kilowatts-hours, or 1.2 kWh) and 3,000 watt-hours (3 kWh) of DC electricity per day, depending on your location. You can check the exact figure for where you live using the peak sun hours figure for your location.

## What are the 3 formulas in ohms law?

3-4: A circle diagram to help in memorizing the Ohm’s Law formulas V = IR, I = V/R, and R= V/I. The V is always at the top. Fig.

## What becomes V If we use 2 resistors of 4W in parallel?

What becomes the Voltage if we use 2 resistors of 4W in parallel? As any other data is not provided, the voltage across two resistors of 4w in parallel is the same.

## What will be the power consumed by a 25 ohm?

Answer: A wire is generally assumed to have no resistance. But if you mean a device or resistor of 25 ohms then the answer is 2500 watts.

## What will happen if you add more batteries to a simple circuit?

Each battery can pump a set number of electrons per second, for a given circuit, so if two or more batteries are connected in parallel the number of electrons they push out each second and energy supplied is added, hence the total current in the circuit is increased.

## What happens if there is a break in a parallel circuit?

In a parallel circuit, there are multiple pathways or branches. If there is a break in any branch, the current will still go through the other branches. Only if all the branches have breaks will the current stop. An added factor in any electric circuit is the resistance involved.

## What happens when you remove a resistor from a series circuit?

In a series circuit the equivalent resistance is the sum of the resistances. If a resistance is removed, the overall resistance decreases (provided there is still continuity in the circuit). Since the resistance is decreased the current will increase as the voltage applied has not changed.

## How much charge must pass by a point in 10’s for the current to be 0.50 a?

Therefore, a 5.0 C charge must pass through the point.