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What is the potential difference? - Science and Technology 1

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प्रश्न

What is the potential difference?

एका वाक्यात उत्तर

उत्तर

The potential difference is the difference in the electric potential of two different points.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Effects of electric current - Answer in one sentence.

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संबंधित प्रश्‍न

Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 Ω resistors. What would be the readings in the ammeter and the voltmeter?


Draw circuit symbols for 

A closed switch


Draw a circuit diagram to show how 3 bulbs can be lit from a battery so that 2 bulbs are controlled by the same switch the third bulb has its own switch. 

 


Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?


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.


What do you understand by an electric circuit?

Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances. 


What do you understand by the open electric circuit?


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?


Increasing the current passing through the wire decreases the magnetic field intensity.


Write scientific reason.

It is beneficial to carry electrical energy in AC form as it is carried over long distances.


Flow of electricity through a closed circuit is _____.


The switch is used to close or open an electric circuit.


Draw the circuit diagram for the series connection.


Higher Order Question

A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder), and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.

  • What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?

Draw the circuit diagram for the following series connection


Study the three electric circuits below. Each of them has a glass rod (G), a steel rod (S), and a wooden rod (W).

In which of the electric circuits would the bulb not light up.


Fuse is


What is electric circuit?


In a simple circuit, why does the bulb glow when you close the switch?


What is the role of the earth wire in domestic circuits?


Assertion: In an open circuit, the current passes from one terminal of the electric cell to another.

Reason: Generally, the metal disc of a cell acts as a positive terminal.


The rate of flow of electric charges in a circuit is called ______.


In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?


In an electric circuit, the current starts from ______.


In the above circuit, if the current reading in the ammeter A is 2A, what would be the value of R1


What are the essential components of an electric circuit?


Paheli connected two bulbs to a cell as shown in Fig. 12.8.

She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.


Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.


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


How is Joule's law effect useful in electric circuits where fuse is used as a safety device?


Assertion: People struck by lightning receive a severe electrical shock.

Reason: Lightning carries very high voltage.


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