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प्रश्न
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
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उत्तर
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संबंधित प्रश्न
In which direction does conventional current flow around a circuit?
Which of the following equation shows the correct relationship between electrical unit?
1A = 1C/s or 1c= 1A/s
Compare how an ammeter and a voltmeter are connected in a circuit.
Fill in the folloing blank with suitable words:
Current is measured in ............... using an ............... placed in ............... in a circuit.
Why should the resistance of:
an ammeter be very small?
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What is the p.d. across the battery?
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- Calculate the current that flows from the battery.
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Which effect of current is utilised in an electric light bulb?
Match the pairs.
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| 1. Free electrons | a. V/R |
| 2. Current | b. Increases the resistance in the circuit |
| 3. Resistivity | c. Weakly attached |
| 4. Resistances in series | d. VA/LI |
An electric kettle is rated 2.5 kW, 250 V. Find the cost of running the kettle for two hours at Rs. 5.40 per unit.
My mother was operating washing machine on Sunday morning. Suddenly, she saw a spark coming out of the electric board and the electric current in the house failed. An electrician was called to look into the matter. What should he have noticed.
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