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CTET Electric Current — practice questions

Explore 51 free Electric Current questions in CTET Science. Open each question or exercise to read its content, reference answers and available explanation.

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Electric Current questions and exercises with answers

Showing questions 1–30 of 51.

What is an electric current, in simple terms?Read the answer and worked solution →Which SI unit is used to measure electric current?Read the answer and worked solution →An ampere is equal to one coulomb of charge passing a point every what?Read the answer and worked solution →The unit of electric current is named after which scientist?Read the answer and worked solution →The conventional direction of current is defined as the direction in which which charges flow?Read the answer and worked solution →A flow of negative charges one way has the same circuit effect as a flow of positive charges in which direction?Read the answer and worked solution →Ohm's law says the current through a conductor is directly proportional to what?Read the answer and worked solution →A 12 V battery drives a current through a 4 ohm resistor. What current flows?Read the answer and worked solution →A wire has 6 V across it and carries 2 A. What is its resistance?Read the answer and worked solution →A 2 ohm heater element draws 5 A. What potential difference is across it?Read the answer and worked solution →If the voltage across a fixed resistor is doubled, what happens to the current?Read the answer and worked solution →In alternating current, what happens to the movement of charge?Read the answer and worked solution →In direct current, how does electric charge move?Read the answer and worked solution →Which device lets alternating current be converted into direct current?Read the answer and worked solution →Which form of electric power is most commonly delivered to homes and businesses?Read the answer and worked solution →Which natural event is an example of an electric current?Read the answer and worked solution →What biological flow of charge is involved in nerves sending signals?Read the answer and worked solution →What are the charge carriers in the metal wires of a circuit usually?Read the answer and worked solution →Passing current through a wire heating it up is called what?Read the answer and worked solution →Joule first studied resistive heating by immersing a wire in water in which year?Read the answer and worked solution →How does an incandescent bulb produce light?Read the answer and worked solution →Heating power in a conductor is proportional to which expression?Read the answer and worked solution →If the current in a fixed resistor doubles, the heating power becomes how many times?Read the answer and worked solution →The watt, the unit of power, is equal to one what per second?Read the answer and worked solution →Electric currents create what, which is used in motors and generators?Read the answer and worked solution →What do time-varying currents emit that are used in telecommunications?Read the answer and worked solution →Components in series share which quantity equally?Read the answer and worked solution →In a series circuit, the total voltage equals what?Read the answer and worked solution →One bulb burns out in a series circuit. What happens to the other bulbs?Read the answer and worked solution →Four bulbs are wired in parallel and three burn out. What happens to the fourth?Read the answer and worked solution →

Worked practice questions

What is an electric current, in simple terms?

  1. A flow of charged particles
  2. A store of heat energy
  3. A pull between magnets
  4. A push of sound waves
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Correct answer: A. A flow of charged particles

1. Electric current is the flow of charged particles such as electrons or ions. 2. Heat storage, magnet pull and sound waves are different physical ideas. 3. So the flow of charged particles is the answer. _Source: Wikipedia, Electric current, Lead section_

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Which SI unit is used to measure electric current?

  1. Volt
  2. Ampere
  3. Ohm
  4. Watt
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Correct answer: B. Ampere

1. Current is expressed in the ampere, symbol A. 2. Volt measures potential difference, ohm measures resistance and watt measures power. 3. So the ampere is correct. _Source: Wikipedia, Electric current, Lead section_

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An ampere is equal to one coulomb of charge passing a point every what?

  1. Every minute
  2. Every hour
  3. Every day
  4. Every second
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Correct answer: D. Every second

1. One ampere is equivalent to one coulomb per second. 2. Minute, hour and millisecond would give different values of current. 3. So the time unit is the second. _Source: Wikipedia, Electric current, Lead section_

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