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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
Name the material which is the best conductor of electricity.
How does the resistance of a wire change when:
its length is tripled?
How does the resistance of a wire change when:
its diameter is tripled?
A p.d. of 4 V is applied to two resistors of 6 Ω and 2 Ω connected in series. Calculate:
(a) the combined resistance
(b) the current flowing
(c) the p.d. across the 6 Ω resistor
The diagram below shows part of a circuit:
If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω
Choose the correct alternative and rewrite the following:
You are given three equal resistances. In how many combinations can they are arranged?
Name the material of wire used for making standard resistances. Give a reason.
Consider the following combinations of resistors:
The combinations having equivalent resistance 1 Q is/are ______.
