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CBSE Class 10 Effects of Electric Current — practice questions — page 5

Explore 163 free Effects of Electric Current questions in CBSE Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Effects of Electric Current questions and exercises with answers

Showing questions 121–150 of 163.

Heat produced in a resistor is proportional to the square of the:Read the answer and worked solution →Joule's law says heat is proportional to resistance and to the:Read the answer and worked solution →The SI unit of electric power is the:Read the answer and worked solution →One kilowatt equals how many watts?Read the answer and worked solution →The commercial unit of electric energy is the:Read the answer and worked solution →Match each quantity to its unitRead the answer and worked solution →Connected in series or in parallel?Read the answer and worked solution →Fill the gaps on electricityRead the answer and worked solution →Sort each item by what it measuresRead the answer and worked solution →Order how a torch lights upRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Pick the right answer, quicklyRead the answer and worked solution →For resistors in series, the total potential difference equals the:Read the answer and worked solution →For resistors in parallel, what quantity adds to give the total?Read the answer and worked solution →Which law is applied to derive the parallel combination result?Read the answer and worked solution →Ohm's law can be written as R equals:Read the answer and worked solution →Rearranged, Ohm's law gives current I equals:Read the answer and worked solution →Joule's law says heat is proportional to the square of the:Read the answer and worked solution →Joule's law also makes heat proportional to the:Read the answer and worked solution →The third factor in Joule's law of heating is the:Read the answer and worked solution →One kilowatt is equal to:Read the answer and worked solution →One watt hour is the energy used when one watt runs for:Read the answer and worked solution →The commercial unit of electric energy is commonly called a:Read the answer and worked solution →One kilowatt hour equals 1000 watts multiplied by how many seconds?Read the answer and worked solution →Two resistors of 6 ohm each in series give an equivalent resistance of:Read the answer and worked solution →Two resistors of 6 ohm each in parallel give an equivalent resistance of:Read the answer and worked solution →Three resistors of 3 ohm each in series give:Read the answer and worked solution →Work out the equivalent resistanceRead the answer and worked solution →Series rule or parallel rule?Read the answer and worked solution →Match each rule to its statementRead the answer and worked solution →

Worked practice questions

Heat produced in a resistor is proportional to the square of the:

  1. Contact
  2. Coupling
  3. Coating
  4. Current
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Correct answer: D. Current

1. This is Joule's law of heating. 2. The relation also involves resistance and time. 3. It goes with the square of the current. _Source: syllabus Science, Ch 12 'Electricity'_

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Joule's law says heat is proportional to resistance and to the:

  1. The time
  2. The turns
  3. The torque
  4. The tension
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Correct answer: A. The time

1. Three factors appear in the law. 2. Current squared and resistance are two. 3. The third is the time the current flows. _Source: syllabus Science, Ch 12 'Electricity'_

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The SI unit of electric power is the:

  1. The joule
  2. The watt
  3. The volt
  4. The ohm
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Correct answer: B. The watt

1. One of them is used by a device at 1 A and 1 V. 2. The symbol is W. 3. It is the watt. _Source: syllabus Science, Ch 12 'Electricity'_

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