Electric Current (VSAQs)

Physical Science | 9. Electric Current – VSAQs:
Welcome to VSAQs in Chapter 9: Electric Current. This page contains the most important VSAQs in this chapter. Aim to secure top marks in your exams by understanding these clear and straightforward Very Short Answer Questions.

VSAQ-1 : List out the material required to verify Ohm’s law experiment.

Materials Required for Verifying Ohm’s Law Experiment

  1. Ammeter: To measure the current passing through the circuit.
  2. Voltmeter: To measure the voltage across the circuit.
  3. 5 dry cells of 1.5V each: To provide the power source for the circuit.
  4. Conducting wires: To connect the components in the circuit.
  5. Iron/Manganin spoke of length 10 cm: To act as a resistor in the circuit.
  6. Switch or key: To control the flow of current in the circuit.
  7. LED: To indicate the presence of current in the circuit.

VSAQ-2 : Write any two differences between ohmic and non-ohmic conductors.

Ohmic Conductors:

  1. Ohm’s Law Compliance: They obey Ohm’s law, where the current is directly proportional to the voltage across the conductor.
  2. Material Examples: Ohmic conductors are typically metallic conductors like copper, aluminum, etc.
  3. V-I Graph Characteristics: The V-I (voltage-current) graph for ohmic conductors is a straight line.

Non-Ohmic Conductors:

  1. Non-Compliance with Ohm’s Law: They do not obey Ohm’s law and do not have a linear relationship between current and voltage.
  2. Material Examples: Non-ohmic conductors can be semiconductor materials like silicon or germanium.
  3. V-I Graph Characteristics: The V-I graph for non-ohmic conductors is a curve or a non-linear graph, indicating the non-proportional relationship between current and voltage.

VSAQ-3 : Draw the electric circuit with the help of a battery, voltmeter, ammeter, resistance and connecting wires.

Components and Configuration of an Electric Circuit

  1. Battery (B): Provides the power source for the circuit.
  2. Ammeter (A): Connected in series to measure the current flowing through the circuit.
  3. Voltmeter (V): Connected in parallel to measure the voltage across the resistor.
  4. Resistor (R): Acts as the load or component that restricts the flow of current in the circuit.
  5. Connecting Wires: Complete the circuit and allow the flow of current from the battery to the resistor and back to the battery.

VSAQ-4 : What happens, if the household electric appliances are connected in series?

Implications of Connecting Household Electric Appliances in Series

  1. Chain-like Connection:
    When household electric appliances are connected in series, they are connected in a chain-like manner where the current flows through one appliance and then the next in sequence.
  2. Circuit Interruption:
    If one appliance in the series circuit fails or becomes disconnected, it breaks the circuit, and the flow of current stops.
  3. Downstream Effect:
    As a result, all the appliances downstream of the failed appliance will stop working until the issue is resolved.
  4. Drawback:
    This is one of the drawbacks of connecting appliances in series, and it is more common to connect them in parallel to avoid such interruptions in case of a single appliance failure.