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Indian Navy SSR (Sailor) Current Electricity — practice questions

Explore 28 free Current Electricity questions in Indian Navy SSR (Sailor) 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 1–28 of 28.

Ohm's law states that, for an ohmic conductor at constant temperature:Read the answer and worked solution →A galvanometer can be CONVERTED to an ammeter by:Read 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

Ohm's law states that, for an ohmic conductor at constant temperature:

  1. $V$ is independent of $I$
  2. $V \propto I^2$
  3. $V \propto \dfrac{1}{I}$
  4. $V \propto I$
Show answer and solution

Correct answer: D. $V \propto I$

Ohm's law: $V = IR$, where $R$ is constant for an ohmic conductor at fixed temperature. So $V$ is *directly proportional* to $I$ — the V–I graph is a straight line through the origin with slope $R$. For non-ohmic conductors (diodes, transistors), $R$ depends on $V$ or $I$, and the graph isn't a straight line.

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A galvanometer can be CONVERTED to an ammeter by:

  1. Removing the galvanometer
  2. Connecting a low resistance (shunt) in PARALLEL
  3. Reversing the wire
  4. Connecting a high resistance in series
Show answer and solution

Correct answer: B. Connecting a low resistance (shunt) in PARALLEL

A low-resistance shunt connected in parallel diverts most current, allowing the galvanometer to measure large currents. Shunt resistance S = I_g G / (I - I_g).

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True or false: what emf actually is

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Questions
  1. Statement is true
    Yes
    Statement
    Despite its name, emf is not a force.
  2. Statement is true
    Yes
    Statement
    emf is the work done per unit charge by the source.
  3. Statement is true
    No
    Statement
    emf is measured in newtons.
  4. Statement is true
    Yes
    Statement
    In an open circuit the emf equals the voltage across the terminals.
  5. Statement is true
    Yes
    Statement
    A steady current needs a closed circuit.
**Your syllabus says it outright:** the emf is NOT a force. It is the work done per unit charge by the source, and equals the terminal voltage in an open circuit. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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