Question

* Read the following and inswer any four questions from 18 (1) to 18 ).
An electric circuit comprises a cell or a battery, a plug key, electrical components and connecting wires.
The current through a resistor is inversely proportional to its resistance. In many practical cases, it is
necessary to increase or decrease the current in an electric circuit.
(1) Which of the following is used almost exclusively for filament of electric lamps?
(c) Copper
(b) Silver
(C) Tungsten
(d) Titanium
(*) Elements of electric heating devices, such as bread toasters and electric iron are generally made
up of:
(a) metal
(b) non-metal
(c) alloy
(4) tỉn
Which of the following terms does not represent electrical power in a circuit?
(6) FR
(b) IR
(c) V
(d) I'R
(w) The resistance of wire varies with its area of cross-section
(a) directly
(b) inversely
(c) independent
(d) None of these
(w) Wires usually employed for clearicity transmission are:
(a) copper and zinc
(b) alumiinium and iron
(c) copper and aluminium
(d) silver and copper​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

i) c) Tungsten

ii) c) Alloy

iii) c) VI

iv) b) Inversely

v) d) Silver and copper