Chemical Effects of Electric Current Class 8 Extra Questions

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Chemical Effects of Electric Current Class 8 Extra Questions. We covered all the Chemical Effects of Electric Current Class 8 Extra Questions in this post for free so that you can practice well for the exam.

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Chemical Effects of Electric Current Class 8 Extra Objective Questions for Students

Which element is the best conductor of electricity?

(A) Silver

(B) Copper

(C) Aluminium

(D) Iron

Option a – Silver

A fuse is used in the main electric supply as a safety device. Which one of the following statements about the fuse is correct?

(A) It is connected in parallel with the main switch

(B) It is made mainly from silver alloys

(C) It must have a low melting point

(D) It must have a very high resistance

Option c – It must have a low melting point

The principle of fuse is

(A) the Chemical effect of electricity

(B) the Mechanical effect of electricity

(C) the Heating effect of electricity

(D) the Magnetic effect of electricity

Option c – the Heating effect of electricity

A fuse wire is characterized by

(A) Low resistance and high melting point

(B) Low resistance and low melting point

(C) High resistance and low melting point.

(D) High resistance and high melting point

Option c – High resistance and low melting point

Which of the following metals is used as filament in lighting bulbs?

(A) Iron

(B) Molybdenum

(C) Silver

(D) Tungsten

Option d – Tungsten

The temperature of the filament of a lighted electric bulb is generally

(A) 100°C to 500°C

(B) 1000°C to 1500°C

(C) 2000°C to 2500°C

(D) 3000°C to 3500°C

Option c – 2000°C to 2500°C

In a three-pin electrical plug, the longest pin should be connected to

(A) the Ground terminal

(B) the Live terminal

(C) the Neutral terminal

(D) Any terminal

Option a – the Ground terminal

In electric apparatus ‘Earth’ is used

(A) To reduce the expenditure

(B) Because the apparatus used 3-phase

(C) For safety

(D) In the form of a fuse

Option c – For safety

The electric current does not flow between two properly connected charged bodies if they are having

(A) the Same charge

(B) the Same capacity

(C) the Same resistivity

(D) the Same potential

Option d – the Same potential

We covered all the chemical effects of electric current class 8 extra questions above in this post for free so that you can practice well for the exam.

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