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ICSE Class 9 Current Electricity — practice questions

Explore 45 free Current Electricity questions in ICSE Class 9 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 1–30 of 45.

Match electrical quantities to unitsRead the answer and worked solution →Direct current (d.c.) is defined as a current thatRead the answer and worked solution →In a cell, the source of energy isRead the answer and worked solution →Primary cells differ from secondary cells because primary cellsRead the answer and worked solution →Conventional current flows fromRead the answer and worked solution →Electric current is defined as theRead the answer and worked solution →The SI unit of electric current is theRead the answer and worked solution →Potential difference between two points equals theRead the answer and worked solution →Ohm's law states that V/I equals a constant calledRead the answer and worked solution →If a current of 2 A flows through a resistance of 5 ohm, the potential difference across it isRead the answer and worked solution →A material whose resistance is so high that no current flows through it is calledRead the answer and worked solution →A current of 0.5 A passes for 2 minutes through a circuit. The charge transferred isRead the answer and worked solution →The work done in moving 5 C of charge between two points kept at a potential difference of 4 V isRead the answer and worked solution →In a torch circuit the cell pushes current of 0.3 A through a bulb of 8 ohm. The voltage of the cell isRead the answer and worked solution →A lead accumulator is used in a car becauseRead the answer and worked solution →An ammeter is a device used to measureRead the answer and worked solution →If 60 C of charge flows in 30 s, the current isRead the answer and worked solution →Which is a correct closed circuit?Read the answer and worked solution →A current of 1 A is defined as the flow ofRead 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 →

Worked practice questions

Match electrical quantities to units

Read exercise and reference answers
Matching pairs
  1. Left
    Current
    Right
    Ampere
  2. Left
    Voltage
    Right
    Volt
  3. Left
    Resistance
    Right
    Ohm
  4. Left
    Power
    Right
    Watt
  5. Left
    Charge
    Right
    Coulomb
Instructions
Tap a quantity such as current or resistance, then tap the unit it is measured in.

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Direct current (d.c.) is defined as a current that

  1. Flows with constant magnitude in one direction
  2. Reverses its direction at regular intervals
  3. Keeps changing its magnitude with time
  4. Flows only when light falls on the wire
Show answer and solution

Correct answer: A. Flows with constant magnitude in one direction

1. Section 9.1 defines direct current. 2. Magnitude stays the same with time. 3. It always flows in one direction. 4. So option A is correct. _Source: Selina Concise Physics Class 9, Ch 9 Current Electricity (Mistral OCR'd PDF), section 9.1_

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In a cell, the source of energy is

  1. Solar energy of the surroundings
  2. Chemical energy of the electrolyte
  3. Mechanical energy of an external load
  4. Heat energy taken from the surroundings
Show answer and solution

Correct answer: B. Chemical energy of the electrolyte

1. A cell has two electrodes in an electrolyte. 2. Chemical reactions at the electrodes drive a current. 3. Chemical energy converts into electrical energy. 4. So option A is correct. _Source: Selina Concise Physics Class 9, Ch 9 Current Electricity (Mistral OCR'd PDF), section on cell_

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