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CTET Electric Current — practice questions — page 2

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 31–51 of 51.

How many paths can current take in a series circuit?Read the answer and worked solution →Resistors of 2, 3 and 5 ohm are joined in series. What is the total resistance?Read the answer and worked solution →How is the total resistance of resistors in parallel found?Read the answer and worked solution →A 12 V supply feeds three identical bulbs in series. What voltage drop is across each?Read the answer and worked solution →Four bulbs run in parallel from a 12 V battery. What voltage does each get?Read the answer and worked solution →Two parallel branches carry 2 A and 3 A. What is the total current?Read the answer and worked solution →Which describes bulbs joined in one continuous loop with the battery?Read the answer and worked solution →If each bulb is wired to the battery in its own separate loop, how are the bulbs connected?Read the answer and worked solution →A battery is a collection of which parts?Read the answer and worked solution →A 12 volt car battery contains how many 2-volt cells connected in series?Read the answer and worked solution →Three 1.5 V cells are joined in series. What is the battery voltage?Read the answer and worked solution →Two 12 V batteries joined in series feed a truck system of what voltage?Read the answer and worked solution →What is an electrical conductor?Read the answer and worked solution →Which statement describes insulators correctly?Read the answer and worked solution →For a given material, resistance of a wire is proportional to which property?Read the answer and worked solution →A thick copper wire compared with an identical thin one has what resistance?Read the answer and worked solution →A wire is made twice as long, with the same material and thickness. What happens to its resistance?Read the answer and worked solution →Resistance of a wire is inversely proportional to what?Read the answer and worked solution →If a wire's cross-section area doubles, its resistance does what?Read the answer and worked solution →A steady 2 A current flows for 5 seconds. How much charge passes?Read the answer and worked solution →What is the symbol used for electric current in formulas?Read the answer and worked solution →

Worked practice questions

How many paths can current take in a series circuit?

  1. Exactly two
  2. Three or more
  3. Only one
  4. No path at all
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Correct answer: C. Only one

1. A series circuit has only one path through which its current can flow. 2. Two, three or more paths describe parallel arrangements. 3. So one path is correct. _Source: Wikipedia, Series and parallel circuits, Series circuits_

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Resistors of 2, 3 and 5 ohm are joined in series. What is the total resistance?

  1. 10 ohm
  2. 30 ohm
  3. 3.3 ohm
  4. 1 ohm
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Correct answer: A. 10 ohm

1. Series resistances add. 2. 2 + 3 + 5 = 10 ohm; 30 comes from multiplying and the others from wrongly using reciprocals. 3. So the total is 10 ohm. _Source: Wikipedia, Series and parallel circuits, Resistance_

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How is the total resistance of resistors in parallel found?

  1. Add resistances directly
  2. Multiply them all
  3. Subtract the smallest
  4. Add the reciprocals
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Correct answer: D. Add the reciprocals

1. For parallel resistors, add the reciprocals of the resistances. 2. Direct addition is the rule for series. 3. Multiplying or subtracting has no basis. _Source: Wikipedia, Series and parallel circuits, Resistance_

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