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प्रश्न
State the factors on which the strength of electric current flowing in a given conductor depends.
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उत्तर
The strength of the electric current flowing in a given conductor depends on two factors:
1) The potential difference across the ends of the conductor
2) The resistance of the conductor
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संबंधित प्रश्न
What Makes an Electric Current Flow in a Wire?
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(d) Which circuit would have less current in it?
Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an â’¶ on your diagram to show where an ammeter should be placed to measure the current.
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(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire
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- A and B
- A and C
A battery of e.m.f. 15 V and internal resistance 3 ohm is connected to two resistors of resistance 3 ohm and 6 ohm in series. Find:
(i) The current through the battery,
(ii) The p.d. between the terminals of the battery.
A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.
Find the effective resistance in the following circuit diagrams (Fig.):
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?
Answer the following question.
What is the function of a galvanometer in a circuit?
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For current to flow, one needs art open circuit.
What does the direction of current convey?
