Question : To prevent damage from lightning, lighting conductors are used on tall structures. The lightning conductor
Option 1: should be made of a good conductor but can be any shape
Option 2: should be in the form of a vertical rod
Option 3: can be any shape
Option 4: should be made of a good conductor like copper with sharp-pointed edges
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Correct Answer: should be made of a good conductor like copper with sharp-pointed edges
Solution : The correct option is should be made of a good conductor like copper with sharp-pointed edges.
Ideally, a lightning conductor should be made of a highly conductive material with sharp, pointed edges. Copper and aluminium are commonly used materials for lightning conductors due to their excellent electrical conductivity. These materials allow the lightning's electrical energy to flow easily through the conductor and safely into the ground. The pointed edges of a lightning conductor help create a strong electric field, which encourages the surrounding air to ionize. This ionized air forms a conductive path that facilitates the dissipation of the lightning's energy.
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Question : When a spoon is to be electroplated with nickel the spoon is
Option 1: Dipped in a nickel sulphate solution
Option 2: Made anode and a pure nickel rod, the cathode
Option 3: Made of cathode and a pure nickel rod, the anode
Option 4: Coated with nickel sulphate and dried
Question : Which of the following is the first man-made plastic that is a bad conductor of heat?
Option 1: Teflon
Option 2: Polythene
Option 3: Bakelite
Option 4: Nylon
Question : Select the most appropriate meaning of the given idiom. To cut corners
Option 1: To reduce corners in a building to save space
Option 2: To save money and economise
Option 3: To cut the corners of a cloth for stitching
Option 4: To remove sharp edges in furniture
Question : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives
Option 1: copper at the cathode, and oxygen at the anode
Option 2: copper at the anode, and oxygen at the cathode
Option 3: copper at the cathode, and anodes dissolve to give copper
Option 4: hydrogen at the cathode, and oxygen at the anode
Question : Directions: In the following question, select the related word from the given alternatives. Good Conductor : Copper :: Bad Conductor : ?
Option 1: Iron
Option 2: Aluminium
Option 3: Wood
Option 4: Coal
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