Advertisements
Advertisements
Question
The accompanying figure shows some electrical appliances connected in a circuit in a house. Answer the following questions.
- By which method are the appliances connected?
- What must be the potential difference across individual appliances?
- Will the current passing through each appliance be the same? Justify your answer.
- Why are the domestic appliances connected in this way?
- If the T.V. stops working, will the other appliances also stop working? Explain your answer.
Advertisements
Solution
- The appliances are connected in parallel.
- The potential difference between all appliances is the same with a parallel connection.
- No, because each appliance has a different load (resistance), the current passing through them will differ.
- Domestic appliances are connected in parallel because the potential difference remains constant.
- No, the other devices will continue working since the current passing through them follows separate routes.
APPEARS IN
RELATED QUESTIONS
Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 Ω resistor, an 8 Ω resistor, and a 12 Ω resistor, and a plug key, all connected in series.
Draw circuit symbols for
a cell
Draw the labelled diagram of an electric circuit comprising of a cell, a resistance, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance : an ammeter or a voltmeter?
How does the short circuit form? What is its effect?
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
Write the condition required for a circuit to be a closed circuit.
In any electric circuit, when the switch is on and the current flows through it why do the wire, switches, bulb or devices become hot?
Write scientific reason.
It is beneficial to carry electrical energy in AC form as it is carried over long distances.
Rahul wants to make an electric circuit. He has a bulb, two wires, a safety pin, and a piece of copper. He does not have any electric cell or battery. Suddenly he gets some idea. He uses lemon instead of a battery and makes a circuit. Will the bulb glow?
In which of the following circuits are the bulb connected in series?
What is electric circuit?
Instead of metal wires, a jute string can be used to make a circuit.
What are the types of electric circuits?
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 Ω in series with a combination of two resistors (4 Ω each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 Ω resistor be the same as that across the parallel combination of 4 Ω resistors? Give reason.
Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’
Name the device used these days in place of electric fuses in electrical circuits.
In the above circuit, if the current reading in the ammeter A is 2A, what would be the value of R1?
In which of the following circuits A, B and C given in the following figure, the cell will be used up very rapidly?
Set up the circuit shown in Figure again. Move the key to ‘ON’ position and watch carefully in which direction the compass needle gets deflected. Switch ‘OFF’ the current. Now keeping rest of the circuit intact, reverse the connections at the terminal of the cell. Again switch ‘on’ the current. Note the direction in which the needle gets deflected. Think of an explanation.
