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JEE Main Effects of Electric Current — practice questions

Explore 37 free Effects of Electric Current questions in JEE Main 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 1–30 of 37.

A heating element in an appliance should not allow current to pass as freely as copper does. Which material from the following is most suitable?Read the answer and worked solution →Which set contains only insulators?Read the answer and worked solution →Which of the following is listed as a resistor material rather than a good conductor?Read the answer and worked solution →A wire allows electric current to pass through it freely because it hasRead the answer and worked solution →Which of the following materials is the best example of a conductor based on the given definitions?Read the answer and worked solution →Current electricity is the study ofRead the answer and worked solution →What is meant by static electricity?Read the answer and worked solution →Which pair of charges will attract each other?Read the answer and worked solution →Two bodies carrying like charges are brought near each other. What happens?Read the answer and worked solution →Which statement about electric charge is correct?Read the answer and worked solution →A body has an excess of electrons. What kind of net charge does it possess?Read the answer and worked solution →Why does an ammeter have very low resistance?Read the answer and worked solution →An ammeter is used to measureRead the answer and worked solution →One ampere is defined as the current whenRead the answer and worked solution →The SI unit of electric current isRead the answer and worked solution →If $6\text{ C}$ of charge passes through a conductor in $3\text{ s}$, the current isRead the answer and worked solution →The correct relation for electric current isRead the answer and worked solution →Electric current is defined asRead the answer and worked solution →A voltmeter is made with very high resistance mainly so that itRead the answer and worked solution →A voltmeter is used to measureRead the answer and worked solution →A conductor carries a steady current of $3\,\text{A}$ for $20\,\text{s}$. How much charge passes through it?Read the answer and worked solution →An ammeter is connected in series in a circuit becauseRead the answer and worked solution →Which instrument is used to measure the electric current flowing through a conductor?Read the answer and worked solution →One ampere is defined as the current whenRead the answer and worked solution →The SI unit of electric current isRead the answer and worked solution →If $2\,\text{C}$ of charge passes through a cross-section of a conductor in $4\,\text{s}$, the current isRead the answer and worked solution →Electric current is best described asRead the answer and worked solution →Which instrument is used to measure the potential difference across the ends of a conductor?Read the answer and worked solution →In the setup used for verifying Ohm's law, the instrument that must be connected across the conductor whose resistance is being studied is theRead the answer and worked solution →If the potential difference across an ohmic conductor is doubled while temperature remains constant, the current through it willRead the answer and worked solution →

Worked practice questions

A heating element in an appliance should not allow current to pass as freely as copper does. Which material from the following is most suitable?

  1. Silver
  2. Copper
  3. Nichrome
  4. Aluminium
Show answer and solution

Correct answer: C. Nichrome

Nichrome is a resistor material with comparatively high electrical resistance so it does not allow current to pass as freely as good conductors such as copper, silver, or aluminium. That makes it suitable where resistance is needed.

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Which set contains only insulators?

  1. Wood, plastic, rubber
  2. Copper, aluminium, silver
  3. Nichrome, manganin, constantan
  4. Iron, rubber, silver
Show answer and solution

Correct answer: A. Wood, plastic, rubber

Insulators are materials with extremely high electrical resistance and do not allow electricity to pass through them. Wood, plastic, and rubber fit this description.

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Which of the following is listed as a resistor material rather than a good conductor?

  1. Aluminium
  2. Silver
  3. Iron
  4. Nichrome
Show answer and solution

Correct answer: D. Nichrome

Nichrome is given as an example of a resistor material with comparatively high electrical resistance. Aluminium, silver, and iron are metals commonly treated here as conductors.

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