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Which of the following precautions need not be taken while using electric gadgets/appliances/circuit? - Science

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Question

Which of the following precautions need not be taken while using electric gadgets/appliances/circuit?

Options

  • We should never touch a lighted electric bulb connected to the mains.

  • We should never experiment with the electric supply from the mains or a generator or an inverter.

  • We should never use just any wire or strip of metal in place of a fuse.

  • We should never turn the switch in ON position.

MCQ
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Solution

We should never turn the switch in ON position.

Explanation:

Precautions that need to be taken:

  1. Never touch a lighted electric bulb connected to the mains: This is dangerous as the bulb and its connections may be live, leading to an electric shock.

  2. Never experiment with the electric supply from the mains, generator or inverter: Doing so can cause electric shocks, short circuits or even fire hazards.

  3. Never use just any wire or strip of metal in place of a fuse: A fuse is designed to protect the circuit from overloads. Using improper materials can lead to fire hazards or damage to electrical components.

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Chapter 14: Electric Current and Its Effects - MULTIPLE CHOICE QUESTIONS [Page 76]

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NCERT Exemplar Science [English] Class 7
Chapter 14 Electric Current and Its Effects
MULTIPLE CHOICE QUESTIONS | Q 5. | Page 76
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