Physics – Electricity

1. Which among the following metals is used for the filament of most electric bulbs?

  1. Tungsten
  2. Copper
  3. Iron
  4. Silver
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Answer: Option A. Tungsten

2. Which of the following is the commercial unit of electrical energy?

  1. Ampere-hour
  2. Volt-hour
  3. Kilowatt-hour
  4. Ohm
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Answer: Option C. Kilowatt-hour

3. Which of the following is known as the property of a conductor to resist the flow of charge?

  1. Conductance
  2. Inductance
  3. Capacitance
  4. Resistance
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Answer: Option D. Resistance

4. According to Ohm’s law, how does the current passing through the conductor change if we double its resistance?

  1. The current will double
  2. The current will be halved
  3. The current will remain the same
  4. The current will quadruple
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Answer: Option B. The current will be halved

5. What do we call the act of moving a unit of charge from one point to another?

  1. Potential Difference
  2. Energy
  3. Power
  4. Resistance
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Answer: Option A. Potential Difference