Advertisements
Advertisements
Question
Why are thick copper wires used as connecting wires?
Advertisements
Solution
The resistance of connecting wires should be almost negligible. For this thick wires are used . since a thicker wire has a small resistance and the wires are made of copper because the resistivity of copper is low.
APPEARS IN
RELATED QUESTIONS
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
Calculate the combined resistance in each case:
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
What material is used for making wire to prepare heating coils? Give a reason.
How does the resistivity of a semiconductor depend on temperature?
State a relation between electrical power, resistance and potential difference in an electrical circuit.
State and explain the laws of resistance.
You are provided with three resistors of resistance 1.0 Ω, 2.0 Ω and 3.0 Ω How would you connect them to obtain the total effective resistance 1.5 Ω? Draw diagram of the arrangement and check it by calculations.
Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.
