Voltage in parallel circuits
Lesson 9 / 9
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Waxaan sharxi karaa qaanuunka korantada (voltage) ee wareegga barbar socda.
Introduction
In this lesson: I can describe the rule for voltages in a parallel circuit. A voltmeter is connected to each side of a cell, battery or component. Voltage (or potential difference) is measured in volts (V).
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Quizzes
1. Which of the following statements about series circuits is correct?
- There are junctions.
- Correct answer:There is only one loop.
- The current can flow in different branches.
- The current is higher in some components.
2. Which of the following statements about parallel circuits is correct?
- Correct answer:There are junctions.
- There is only one loop.
- The current is the same everywhere in the circuit.
- The current always splits equally at a junction.
3. Which of the following statements about the junctions in a parallel circuit are correct?
- The current is the same in all branches at a junction.
- Correct answer:The current can split at a junction.
- Correct answer:The current can join up at a junction.
- Some branches at a junction get no current.
4. When building a parallel circuit, which of the following statements describes the most effective method to use?
- Always start at the battery.
- Always go anticlockwise.
- The components must be exactly in the positions shown on the circuit diagram.
- Correct answer:Complete each loop one at a time.
5. Which of the following statements about circuit diagrams is correct?
- Small gaps are permitted.
- The battery must point to the right.
- Correct answer:Straight horizontal and vertical lines are needed.
- A variety of symbols or pictures can be used for a single component.
6. A real parallel circuit is made using a circuit diagram for reference. Which of the following statements is correct?
- The components must be in the same positions as the diagram.
- Correct answer:The number of components and loops will be the same.
- The circuit and the diagram will look exactly the same.
1. Which of the following devices measures the 'push' that a cell or a battery gives to current?
- an ammeter
- a newton meter
- Correct answer:a voltmeter
- a joulemeter
2. Which of the following statements correctly describe how voltmeters should be connected?
- Correct answer:In parallel to the component they are measuring.
- In series with the component they are measuring.
- Before the component they are measuring.
- After the component they are measuring.
3. What will happen to the lamps in the circuit shown when the circuit is connected?
- Correct answer:only lamp 1 will light
- only lamp 2 will light
- both lamps will light
- lamp 1 will be bright and lamp 2 will be dim
4. What is the voltage across the lamp if the voltage of the battery is 1.5 V?
- 0.5 V
- 0.75 V
- Correct answer:1.5 V
- 3.0 V
5. What is the voltage across the battery of two cells if the voltage across the resistor is 2.0 V and across the motor is 3.0 V?
- 1.0 V
- Correct answer:3.0 V
- 4.0 V
- 6.0 V
6. What is the voltmeter measuring?
- The voltage across the resistor only.
- The voltage across the lamp only.
- The voltage across the resistor and lamp only.
- Correct answer:The voltage across the resistor, the lamp and the battery.
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 · 6 questions