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संबंधित प्रश्न
Complete the following :-
(a)
Find the expression for resistors connected in series.
Why is the series arrangement not used for domestic circuits?
An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
Name the following substance showing low resistivity.
What material is used for making wire to prepare heating coils? Give a reason.
State expression for Cells connected in parallel.
When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:
