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प्रश्न
What does an electric circuit mean?
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उत्तर
A continuous and closed path of an electric current is called an electric circuit. An electric circuit consists of electric devices, source of electricity and wires that are connected with the help of a switch.
संबंधित प्रश्न
Fill in the folloing blank with suitable words:
Current is measured in ............... using an ............... placed in ............... in a circuit.
<p> Define the unit of electric current (or Define ampere).
If the current through a floodlamp is 5 A, what charge passed in 10 seconds?
(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
A student made an electric circuit shown here to measure the current through two lamps.
Are the lamps in series or parallel?
(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.
State three factors on which the heat produced by an electric current depends. How does it depend on these factors?
A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?
In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.
- A and B
- A and C
A wire of length 5 m has a resistance of 2.0 Ω calculate:
(a) the resistance of wire of length 1 m
(b) the equivalent resistance if two such wires each of length 2 m are joined in parallel.
(c) the resistance of 1 m length of wire of same material but of half diameter.
A bulb marked 12 V, 24 W operates on a 12 volt car battery for 20 minutes. Calculate:
(i) The current flowing through it, and
(ii) The energy liberated.
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.
State the condition when it is advantageous to connect cells in series.
Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
Electrons in a conductor move from:
In the process of current flow through a conductor, the amount of charge passing per unit time gives:
