Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

Nichrome element is used in household appliances because of the following characteristics.

(A) Its melting point is high
(B) Its resistivity is large
(C) It is tensile
(D) It does not oxidize easily by the oxygen of the air when heated

Choose the correct answer from the options given below:

Options:

(A), (B) and (D) only

(A), (B) and (C) only

(A), (B), (C) and (D)

(B), (C) and (D) only

Correct Answer:

(A), (B), (C) and (D)

Explanation:

Nichrome is an alloy of nickel and chromium used as a heating element because of the following reasons:

(A) It has a high melting point, so it can withstand high temperatures without melting.

(B) It has a large resistivity, which helps produce sufficient heat even with moderate current.

(C) It is tensile, meaning it is strong and flexible enough to be drawn into thin wires without breaking.

(D) It does not oxidize easily when heated, which increases its durability and prevents surface damage.

Hence, all (A), (B), (C), and (D) are correct.