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Karnataka SSLC (Class 10) Electricity — practice questions

Explore 15 free Electricity questions in Karnataka SSLC (Class 10) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Electricity questions and exercises with answers

Showing questions 1–15 of 15.

The SI unit of electric current is theRead the answer and worked solution →In a circuit, an ammeter and a voltmeter are correctly connected respectivelyRead the answer and worked solution →One volt of potential difference is defined asRead the answer and worked solution →The SI unit of electrical resistance is theRead the answer and worked solution →Ohm's law states that at constant temperature the current through a conductor isRead the answer and worked solution →The resistance of a metallic wire isRead the answer and worked solution →Which material is used for the heating element of appliances like electric irons because of its high resistivity and high melting point?Read the answer and worked solution →When three resistors are connected in series, the equivalent resistance isRead the answer and worked solution →For resistors in parallel, the reciprocal of the equivalent resistance equalsRead the answer and worked solution →Two resistors, each of resistance $R$, are connected in parallel. Their equivalent resistance isRead the answer and worked solution →The electric power dissipated in a resistor can be written asRead the answer and worked solution →Joule's law of heating states that the heat produced in a resistor isRead the answer and worked solution →A potential difference of 12 V is applied across a $4\ \Omega$ resistor. The current through it isRead the answer and worked solution →The commercial unit of electrical energy, '1 unit', isRead the answer and worked solution →If the resistance of a component is kept constant and the voltage across it is doubled, the current through it willRead the answer and worked solution →

Worked practice questions

The SI unit of electric current is the

  1. ampere
  2. volt
  3. ohm
  4. coulomb
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Correct answer: A. ampere

1. Electric current is the rate of flow of charge. 2. Its SI unit is the **ampere (A)**: 1 A = 1 coulomb per second. 3. Volt is for potential difference, ohm for resistance, coulomb for charge. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch12 'Electricity', §12.1_

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In a circuit, an ammeter and a voltmeter are correctly connected respectively

  1. both in series
  2. in series and in parallel
  3. both in parallel
  4. in parallel and in series
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Correct answer: B. in series and in parallel

1. An **ammeter** measures current, so it is connected **in series** so the whole current passes through it. 2. A **voltmeter** measures potential difference, so it is connected **in parallel** across the component. 3. Hence: ammeter in series, voltmeter in parallel. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch12 'Electricity', §12.1-12.2_

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One volt of potential difference is defined as

  1. 1 coulomb per joule
  2. 1 ampere per ohm
  3. 1 joule per coulomb
  4. 1 joule per second
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Correct answer: C. 1 joule per coulomb

1. Potential difference = work done per unit charge, V = W/Q. 2. So **1 volt = 1 joule / 1 coulomb** (energy given to each coulomb). 3. 1 J/s is the watt (power), not the volt. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch12 'Electricity', §12.2_

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