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प्रश्न
What is an electric current?
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उत्तर
An electric current is the flow of electric charge called electrons in a conductor and its magnitude is the amount of electric charge passing through a given point of the conductor in one second.
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संबंधित प्रश्न
What does an electric circuit mean?
In which direction do electrons flow?
Fill in the folloing blank with suitable words:
Current is measured in ............... using an ............... placed in ............... in a circuit.
Why should the resistance of:
a voltmeter be very large?
The p.d. across a 3 Ω resistor is 6 V. The current flowing in the resistor will be:
(a) `1/2A`
(b) 1 A
(c) 2 A
(d) 6 A
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
How do you think the brightness of two lamps arranged in parallel compares with the brightness of two lamps arranged in series (both arrangements having one cell)?
If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
An electric current flowing in a wire creates ______ around the wire.
What is international convention of colour coding in a cable?
Tick(✓) the correct choice in the following:
Which of the following quantities has the same value for all electrical
appliances connected to the ring main circuit in a house?
The circuit diagram in fig shows two coils of an insulated copper wire wound on a cardboard tube. G is a center zero galvanometer.
(a) Describe what will happen when th e swi tch K is cl osed for severa l
seconds and then opened again .
(b) What will be the effect of repeating the experiment with an iron placed in the tube?
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
State expression for Cells connected in series.
State the condition when it is advantageous to connect cells in series.
The SI unit for electric current is the coulomb.
The flow of electric charge per unit time is called potential difference.
