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प्रश्न
What does an electric circuit mean?
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
Which of the following equation shows the correct relationship between electrical unit?
1A = 1C/s or 1c= 1A/s
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
An electric bulb of resistance 20 Ω and a resistance wire of 4 Ω are connected in series with a 6 V battery.
Draw the circuit diagram, and calculate:
(a) total resistance of the circuit.
(b) current through the circuit.
(c) potential difference across the electric bulb.
(d) potential difference across the resistance wire.
The following table shows the current in Amperes and potential differences in Volts.
- Find the average resistance.
- What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)
- Which law will the graph prove? Explain the law.
| V (volts) | I (amp) |
| 4 | 9 |
| 5 | 11.25 |
| 6 | 13.5 |
If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
Find the effective resistance in the following circuit diagrams (Fig.):
An auto lamp is joined to a battery of e.m.f. 4 V and internal resistance 2.5Ω. A steady current of 0.5 A flows through the circuit. Calculate the
(a) Total energy provided by battery in 10 minutes,
(b) Heat dissipated in the bulb in 10 minutes.
Define the term kilowatt - hour and state its value in S.I. unit.
Complete the following:
1 kWh = _________ J
Calculate the current through a 60 W lamp rated 250 V. If the line voltage falls to 200 V, how is power consumed by the bulb affected?
State expression for Cells connected in series.
State the condition when it is advantageous to connect cells in series.
True or False – If False give the correct answer
The representation of the electric current is A
Define electric current and give its unit.
Name any two devices, which are working on the heating effect of the electric current.
An ammeter is always placed in parallel with the circuit.
