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AAI Junior Executive (ATC) Current Electricity — practice questions

Explore 29 free Current Electricity questions in AAI Junior Executive (ATC) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Current Electricity questions and exercises with answers

Showing questions 1–29 of 29.

A galvanometer of resistance G can be converted into a voltmeter of range V by connecting in series a high resistance R given by:Read the answer and worked solution →Two 100-W bulbs are connected in series across 220 V. The total power consumed is:Read the answer and worked solution →Split the two circuit lawsRead the answer and worked solution →True or false: what emf actually isRead the answer and worked solution →Complete the statement of Ohm's lawRead the answer and worked solution →Tap every way Ohm's law can failRead the answer and worked solution →Match each device or material to its behaviourRead the answer and worked solution →Sort each material by its resistivityRead the answer and worked solution →Complete the resistance relationRead the answer and worked solution →True or false: resistance and resistivityRead the answer and worked solution →Match each of Kirchhoff's rules to what it conservesRead the answer and worked solution →Kirchhoff's rulesRead the answer and worked solution →Order the steps: find an unknown resistance with a Wheatstone bridgeRead the answer and worked solution →True or false: internal resistanceRead the answer and worked solution →Which quantity is which?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Charge carriersRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every statement true of drift velocityRead the answer and worked solution →Complete the temperature coefficient definitionRead the answer and worked solution →Flip and pair: symbol with quantityRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →Property of the object or of the substance?Read the answer and worked solution →Order the chain: field to currentRead the answer and worked solution →True or false: circuits and sourcesRead the answer and worked solution →Assertion and reason: circuitsRead the answer and worked solution →Tap every quantity the chapter treats as material-dependentRead the answer and worked solution →

Worked practice questions

A galvanometer of resistance G can be converted into a voltmeter of range V by connecting in series a high resistance R given by:

  1. R = G + V
  2. R = V / I_g − G
  3. R = G I_g / V
  4. R = V · G
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Correct answer: B. R = V / I_g − G

1. Galvanometer gives full deflection at current I_g, so V_g = I_g G. 2. To make it read up to V, drop the excess (V − V_g) across an added series R. 3. At full deflection I_g flows through both, so I_g R = V − I_g G ⇒ R = V/I_g − G. 4. R is large because V/I_g ≫ G typically. _Source: syllabus Physics Ch 3 §3.10 Galvanometer → Voltmeter_

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Two 100-W bulbs are connected in series across 220 V. The total power consumed is:

  1. 50 W
  2. 100 W
  3. 200 W
  4. 400 W
Show answer and solution

Correct answer: A. 50 W

1. Each 100-W bulb at 220 V has R = V²/P = 220²/100 = 484 Ω. 2. In series, total R = 2 × 484 = 968 Ω; voltage 220 V gives I = 220/968 ≈ 0.227 A. 3. Total power = V·I = 220 × 0.227 ≈ 50 W. 4. In series, two identical bulbs share half their normal voltage each → ¼ rated power each → 50 W total. _Source: syllabus Physics Ch 3 §3.10 (combinations and power)_

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Split the two circuit laws

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Left
Current law
Items
  1. Region
    Current law
    Item
    Charge conserved
  2. Region
    Current law
    Item
    Used at a node
  3. Region
    Current law
    Item
    In equals out
  4. Region
    Voltage law
    Item
    Energy conserved
  5. Region
    Voltage law
    Item
    Used on a loop
  6. Region
    Voltage law
    Item
    Rises and drops
  7. Region
    both
    Item
    Sum equals zero
  8. Region
    both
    Item
    Algebraic sum
Right
Voltage law
Instructions
Drag each clue into the current law ring, the voltage law ring, or the overlap holding both.
_Source: Qallery verified question bank, AAI Junior Executive Air Traffic Control, topic Current Electricity_

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