Advertisements
Advertisements
प्रश्न
How much is the potential difference between live and neutral wires?
Advertisements
उत्तर
The potential difference between live and neutral wires is around 220 V.
APPEARS IN
संबंधित प्रश्न
What is a circuit diagram
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?
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
The following figure shows the symbols for components used in the accompanying electrical circuit. Place them at proper places and complete the circuit.
Which law can you prove with the help of above circuit?
A battery is to be formed by joining 3 dry cells with connecting wires. Show how will you connect the wires by drawing a diagram.
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
What do you understand by the open electric circuit?
Draw a neat diagram showing a closed electric circuit.
Draw a neat diagram showing a open electric circuit.
What is open circuit?
The unit of electrical power is _______.
Find the odd one out and give its explanation.
Write scientific reason.
It is beneficial to carry electrical energy in AC form as it is carried over long distances.
What is the use of earthing wire?
In the given circuit diagram, which of the given switch(s) should be closed. So that only bulb A glows.
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?
Draw the circuit diagram for the following series connection
Which of the following a simple circuit must-have?
_____ has a thin metallic filament that melts and breaks the connection when the circuit is overheated.
Three bulbs are connected end to end from the battery. This connection is called _______.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
In a simple circuit, why does the bulb glow when you close the switch?
When a circuit is open, _____ cannot pass through it.
Instead of metal wires, a jute string can be used to make a circuit.
A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.
Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’
Our body is a ______ of electricity.
Draw the symbols of the following circuit components.
Switch in off position
In the above circuit, if the current reading in the ammeter A is 2A, what would be the value of R1?
Match the following
| 1. | Insulator | a. | Coulomb |
| 2. | Conductor | b. | Electric circuit |
| 3. | Closed path | c. | Copper |
| 4. | Electric charge | d. | Rubber |
In which of the following circuits A, B and C given in the following figure, the cell will be used up very rapidly?
Will the bulb glow in the circuit shown in the following figure? Explain.
Overloading of electric circuits can lead to short-circuiting.
A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire
An electric motor rated 1100 W is connected to 220 V mains. Find:
- The current drawn from the mains,
- Electric energy consumed if the motor is used for 5 hours daily for 6 days.
- Total cost of energy consumed if the rate of one unit is 5.
