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Test: Chemical Effects of Electric Current- 2 - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Chemical Effects of Electric Current- 2

Test: Chemical Effects of Electric Current- 2 for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Chemical Effects of Electric Current- 2 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Chemical Effects of Electric Current- 2 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemical Effects of Electric Current- 2 below.
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Test: Chemical Effects of Electric Current- 2 - Question 1

How can we detect a weak current using a tester?

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 1
We can detect a weak current using a tester by using a LED instead of a bulb, as LEDs can glow even with a small current, making it easier to detect weak currents.
Test: Chemical Effects of Electric Current- 2 - Question 2

Why is it necessary to wipe dry the ends of the tester before testing a new liquid?

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 2
It is necessary to wipe dry the ends of the tester before testing a new liquid to prevent mixing of liquids, which could affect the results and accuracy of the conductivity test.
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Test: Chemical Effects of Electric Current- 2 - Question 3

Electric circuit provides a complete path for

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 3

The close and continuous path of electric current is called electric circuit. Electric circuit provides a complete path for current to flow.

Test: Chemical Effects of Electric Current- 2 - Question 4
What does the presence of mineral salts in natural water contribute to?
Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 4
The presence of mineral salts in natural water contributes to its good conductivity, making it a better conductor of electricity than distilled water.
Test: Chemical Effects of Electric Current- 2 - Question 5

The bulb glows when the electric current passes through it due to

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 5

When electric current passes through the filament of bulb get heated and start emitting light and heat energy. So, heating effect of electric current is applied in bulb.

Test: Chemical Effects of Electric Current- 2 - Question 6

In battery two or more cells are connected in

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 6

2 or 3 cells are combined and connected electrically in series and have two main terminals: positive and negative terminals. 

Test: Chemical Effects of Electric Current- 2 - Question 7

Which metal is electroplated on iron for making “cans” for storing food and drinks?

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 7

Tin is electroplated on iron for making cans for storing food and drinks as tin is less reactive than iron.

Test: Chemical Effects of Electric Current- 2 - Question 8

When the liquid between two ends allow electric current, then

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 8

When the liquid between two ends allow electric current to pass through them, the bulb of tester blows.

Test: Chemical Effects of Electric Current- 2 - Question 9
What happens to a compass needle when current flows through a nearby wire?
Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 9
A compass needle deflects when current flows through a nearby wire due to the magnetic effect of the electric current, indicating the presence of the current.
Test: Chemical Effects of Electric Current- 2 - Question 10

Which of the following is a poor conductor of electricity?

Detailed Solution for Test: Chemical Effects of Electric Current- 2 - Question 10

Tap water, iron nail and steel spoon are good conductor of electricity but air is poor conductor of electricity.

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