Measuring current in a parallel circuit
Lesson 8 / 9
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Waxaan sharxi karaa sida loo cabbiro xoogga korontada (current) ee laamaha kala duwan ee wareegga barbar socda.
Introduction
In this lesson: I can describe how to measure current through each branch of a parallel circuit. Current through the battery in a parallel circuit is measured with an ammeter, connected next to one end of the battery. There are connections to the rest of the circuit at the ends of each branch in a parallel circuit.
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Quizzes
1. Which of the following statements about current in a series circuit is correct?
- The current decreases as it travels through the circuit.
- There is a lower current through a component, e.g. a resistor, than a battery.
- Correct answer:All the current flows through all the components.
- Components with resistance use up the current.
2. Which of the following quantities is an ammeter used to measure?
- voltage
- Correct answer:current
- resistance
- force
3. Which of the following units is current measured in?
- Correct answer:amperes
- volts
- ohms
- farads
4. Which of the following statements about current through a metal wire is correct?
- Correct answer:Current is the flow of electrons per second.
- Current is the speed with which electrons move.
- Current is the push of the electrons.
- Current is the flow of protons through the wire.
5. What is the reading on the ammeter?
- 0.0 A
- 0.1 A
- 0.2 A
- 0.3 A
- Correct answer:0.4 A
6. Which of the following statements about an ammeter is correct?
- The symbol for an ammeter is an 'a'.
- Correct answer:An ammeter has a very, very low resistance.
- An ammeter has a high resistance.
- An ammeter only lets some of the current in a series circuit flow through it.
1. A parallel circuit contains a battery and several branches that have different components on. Which of the following statement is correct?
- The current in all the branches will always be equal.
- The current in the branches will be greater than the current in the battery.
- The total current in the branches will be less than the current in the battery.
- Correct answer:The total current in the branches will be equal to the current in the battery.
2. Which component is the ammeter in the circuit shown measuring the current through?
- Correct answer:the battery
- the resistor
- the lamp
- Correct answer:the lamp and the resistor
3. What is the rule for current at junctions in a parallel circuit?
- Correct answer:Current going into the junction equals current going out of the junction.
- Current going into the junction is less than current going out of the junction.
- Current going into the junction is more than current going out of the junction.
4. What is the current through the electric cell in the circuit shown?
- 0.20 A
- 0.40 A
- Correct answer:0.60 A
- 0.80 A
5. What is the current through the lamp in the circuit shown?
- 0.20 A
- 0.40 A
- Correct answer:0.60 A
- 0.80 A
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 6 questions
- Lesson videoLearn
- Exit quizCheck · 5 questions