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प्रश्न
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
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उत्तर
Generator.
All others are related to safety measures to avoid mishap due to electricity.
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संबंधित प्रश्न
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.
What do the following symbols mean in circuit diagrams?
Draw circuit symbols for
a cell
Draw circuit symbols for
A closed switch
What is a circuit diagram
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
Two tungsten bulbs of power 50 W and 60 W work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor?
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?
In an electric circuit, electron flow a from of point of ______ potential to the point of ______ potential.
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.
Draw a neat diagram showing a closed electric circuit.
Draw a neat diagram showing a open electric circuit.
Name the instrument used to control current in an electric circuit.
Explain the following:
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?
If you touch an electric wire carrying current you get a shock, but if on the same wire the birds sit they do not get any shock/current. Explain why?
The unit of electrical power is _______.
How much is the potential difference between live and neutral wires?
What is the use of earthing wire?
______ is the device used to close or open an electric circuit.
In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit ______.
Which of the following a simple circuit must-have?
What is electric circuit?
What are the types of electric circuits?
In an electric circuit, the current starts from ______.
Our body is a ______ of electricity.
Draw the symbols of the following circuit components.
Switch in off position
Observe the circuit given:
1. Would any of the bulbs glow when the switch is in the ‘OFF’ position?
2. What will be the order in which the bulbs A, B, and C will glow when the switch is moved to the ‘ON’ position?
Match the following
| 1. | Insulator | a. | Coulomb |
| 2. | Conductor | b. | Electric circuit |
| 3. | Closed path | c. | Copper |
| 4. | Electric charge | d. | Rubber |
In the following arrangement shown in the following figure, the bulb will not glow if the ends A and B are connected with
Paheli connected two bulbs to a cell as shown in the following figure.
She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.
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.
How is Joule's law effect useful in electric circuits where fuse is used as a safety device?
