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प्रश्न
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उत्तर
The resistance of the wire depends on the following factors :
(i) Length of the wire
(ii) Cross-section of the wire
(iii) The temperature of the wire.
(iv) The material of the wire.
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संबंधित प्रश्न
n electrons flow through a cross section of a conductor in time t. If charge on an electron is e, then write an expression for the current in the conductor.
(a) Complete the circuit given in Fig. by inserting between the terminals A and C. an ammeter.
(b) In the diagram, mark the polarity at the terminals of ammeter and indicate clearly the direction of flow of current in the circuit when the circuit is complete.
(c) Name and state the purpose of Rh in the circuit.
A cell of potential difference 12 V is connected to a bulb. The resistance of filament of bulb when it glows is 24Ω. Find the current drawn from the cell.
Select the correct option:
In a metallic conductor, electric current is thought to be due to movement of:
State the kind of charge on a negative ion.
The following Figure represents a negatively charged gold Ieaf electroscope. Label the parts, P, Q, and R and the estate whether each is an insulator or a conductor. Also, indicate the distribution of charges on the system in the diagram.
What do you mean by the potential difference? Write its SI unit.
Compare the brightness of two 60 watt bulbs.
When they are connected in parallel.
Explain giving scientific reasons.
