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प्रश्न
What is the Flow of Charge Called?
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उत्तर
The flow of electric charge in a conductor is called electric current. If a charge of Qcoulombs flows through a conductor in time t seconds, the magnitude of electric current is given by, I = Q/t.
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संबंधित प्रश्न
Which of the following equation shows the correct relationship between electrical unit?
1A = 1C/s or 1c= 1A/s
What is an electric current?
In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result.
What current flows from the battery?
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.
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A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?
A fuse is a short piece of wire of high ______ and low ______.
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connected to the plug contains 3 wires with colour coded insulation namely brown, blue and green.
- Identify each of the colour coded wires by stating to which of the
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circumstances. - What is the purpose of the earthed wire connected to an electric
appliance like an electric heater? Describe how it works.
If the potential differences between two parts of a thundercloud is 10s V,
what is the amount of energy given up during the passage of 20 coulombs?
(a)2x10-7J
(b)200J
(c)Sx106 j
(d)2x 109J
(e)2x 1010 J
A wire is passed through a piece of cardboard as shown in fig .. An electric current flows vertically down the wire and then flows back up. The two sections of the write are observed to repel each other.
(a) Wi th the aid of a diagram, describe how you would plot the magnetic field lines on the card .
(b) Sketch the magnetic field patterns around both the sections of the wire. Use your sketch to explain why the two sections repel each other.
(c) The repulsive force between the two sections is small. What changes could be made to increase it?
Fill in the blank :
1 mA = ............................. A.
For current to flow, one needs art open circuit.
What is the rate at which charges flow past a point on a circuit?
1020 electrons, each having a charge of 1.6 x 10-19 C, flows in a circuit V is 0.1s. What is the current in ampere?
Electrons in a conductor move from:
The magnitude of Alternating Current (AC):
