Which one of the following statements is NOT correct?
A voltmeter has a low resistance and an ammeter has a high resistance
Correct Answer: (d) A voltmeter has a low resistance and an ammeter has a high resistance
Explanation: The voltmeter has a high resistance to prevent current from flowing through it, and the ammeter has a low resistance to allow current to pass through it.
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- Which one among the following statements is correct?
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Ultrasonic sounds are the sounds which have frequencies?
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With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
