Physics
Grade-9
Easy

Question

If a body is charged by rubbing, its weight:

  1. Increases
  2. Decreases
  3. Can increase or decrease
  4. Cannot say

Hint:

The bodies gain or lose electrons. When a body is charged by rubbing, its weight may increase or decrease slightly.

The correct answer is: Can increase or decrease


    When a body is charged by rubbing, its weight can increase or decrease.
    • When the body is charged by rubbing, there are chances to gain or lose electrons.
    • The weight of a body increases when it gains electrons.
    • The weight of the body decreases as it loses electrons.
    • Thus, there will be a slight increase or decrease in the weight of the body when it is rubbed.

    Related Questions to study

    Grade-9
    Physics

    Which statement is true about both the figures?

    1. ‘A’ shows thermocouple effect and ‘B’ shows friction to produce electricity
    2. ‘A’ shows thermocouple effect and ‘B’ shows piezoelectric effect to produce electricity
    3. ‘A’ shows piezoelectric effect and ‘B’ shows thermocouple effect to produce electricity
    4. ‘A’ shows friction and ‘B’ shows thermocouple effect to produce electricity

    Which statement is true about both the figures?

    PhysicsGrade-9
    1. ‘A’ shows thermocouple effect and ‘B’ shows friction to produce electricity
    2. ‘A’ shows thermocouple effect and ‘B’ shows piezoelectric effect to produce electricity
    3. ‘A’ shows piezoelectric effect and ‘B’ shows thermocouple effect to produce electricity
    4. ‘A’ shows friction and ‘B’ shows thermocouple effect to produce electricity
    Grade-9
    Physics

    What is the function of every generator?

    1. Changing wind energy into electrical energy
    2. Changing heat energy into electrical energy
    3. Changing mechanical energy into electrical energy
    4. Changing solar energy into electrical energy

    What is the function of every generator?

    PhysicsGrade-9
    1. Changing wind energy into electrical energy
    2. Changing heat energy into electrical energy
    3. Changing mechanical energy into electrical energy
    4. Changing solar energy into electrical energy
    Grade-9
    Physics

    Ordinary rubber is an insulator, but the special rubber that is tyres of air crafts are made slightly conducting. Why is this necessary?

    1. To decrease the price.
    2. To increase the aircrafts stability.
    3. To remove the charges generated due to friction.
    4. Incomplete information.

    Ordinary rubber is an insulator, but the special rubber that is tyres of air crafts are made slightly conducting. Why is this necessary?

    PhysicsGrade-9
    1. To decrease the price.
    2. To increase the aircrafts stability.
    3. To remove the charges generated due to friction.
    4. Incomplete information.
    parallel
    Grade-9
    Physics

    What do fuel cells, batteries and solar cells have in common?

    1. They all produce electricity
    2. They are used to create magnetic field
    3. They are all cheap in price
    4. They all can be used to power automobiles

    What do fuel cells, batteries and solar cells have in common?

    PhysicsGrade-9
    1. They all produce electricity
    2. They are used to create magnetic field
    3. They are all cheap in price
    4. They all can be used to power automobiles
    Grade-9
    Physics

    When a glass rod is rubbed with silk:

    1. Negative charge is produced on silk, but no charge is produced on the glass rod.
    2. Equal but opposite charges are produced on both the materials.
    3. Equal and similar charges are produced on both the materials.
    4. Positive charge is produced on the glass rod  but no charge is produced on the silk.

    When a glass rod is rubbed with silk:

    PhysicsGrade-9
    1. Negative charge is produced on silk, but no charge is produced on the glass rod.
    2. Equal but opposite charges are produced on both the materials.
    3. Equal and similar charges are produced on both the materials.
    4. Positive charge is produced on the glass rod  but no charge is produced on the silk.
    Grade-9
    Physics

    Which of these is used for the separation of charges to generate electricity?

    Which of these is used for the separation of charges to generate electricity?

    PhysicsGrade-9
    parallel
    Grade-9
    Physics

    Which of these is used for the separation of charges to generate electricity?

    Which of these is used for the separation of charges to generate electricity?

    PhysicsGrade-9
    Grade-9
    Physics

    What process happens in solar cell?

    1. Process of creating photons from voltage
    2. Process of converting kinetic energy into electricity
    3. Process of creating light from electricity
    4. Process of converting sunlight into electricity

    What process happens in solar cell?

    PhysicsGrade-9
    1. Process of creating photons from voltage
    2. Process of converting kinetic energy into electricity
    3. Process of creating light from electricity
    4. Process of converting sunlight into electricity
    Grade-9
    Physics

    Magnetism produces electricity in:

    1. Generators
    2. Incubators
    3. Manipulators
    4. Piezoelectric crystals

    Magnetism produces electricity in:

    PhysicsGrade-9
    1. Generators
    2. Incubators
    3. Manipulators
    4. Piezoelectric crystals
    parallel
    Grade-9
    Physics

    What is the one possible reason that "Conservation of electricity is a good idea".

    1. It is often produced by nonrenewable source of energy.
    2. Limited amount of power supply is given to each household.
    3. Using too much electricity can cause fire.
    4. Using too much electricity can cause transformers to break down.

    What is the one possible reason that "Conservation of electricity is a good idea".

    PhysicsGrade-9
    1. It is often produced by nonrenewable source of energy.
    2. Limited amount of power supply is given to each household.
    3. Using too much electricity can cause fire.
    4. Using too much electricity can cause transformers to break down.
    Grade-9
    Physics

    How does a generator create current?

    1. By using a magnet.
    2. By using a fan.
    3. By using energy from the sun.
    4. By using heat from the oil.

    How does a generator create current?

    PhysicsGrade-9
    1. By using a magnet.
    2. By using a fan.
    3. By using energy from the sun.
    4. By using heat from the oil.
    Grade-9
    Physics

    Piezoelectric effect is when materials produce electric charges when:

    1. Voltage is applied
    2. Mechanical stress is applied
    3. Electric field is applied
    4. Magnetic field is applied

    Piezoelectric effect is when materials produce electric charges when:

    PhysicsGrade-9
    1. Voltage is applied
    2. Mechanical stress is applied
    3. Electric field is applied
    4. Magnetic field is applied
    parallel
    Grade-9
    Physics

    An object becomes negatively charged by:

    1. Losing electrons
    2. Gaining electrons
    3. Losing protons
    4. Gaining protons

    An object becomes negatively charged by:

    PhysicsGrade-9
    1. Losing electrons
    2. Gaining electrons
    3. Losing protons
    4. Gaining protons
    Grade-9
    Physics

    Old turntables and record players used which electrical source to make music? Hint: the needle used to be a crystal.

    1. Thermoelectric
    2. Piezoelectric
    3. Magnetomotive 
    4. Chemical reaction

    Old turntables and record players used which electrical source to make music? Hint: the needle used to be a crystal.

    PhysicsGrade-9
    1. Thermoelectric
    2. Piezoelectric
    3. Magnetomotive 
    4. Chemical reaction
    Grade-9
    Physics

    The piezoelectric materials used for converting energy are called_______.

    1. Transition devices.
    2. Converter.
    3. Dielectric.
    4. transducer.

    The piezoelectric materials used for converting energy are called_______.

    PhysicsGrade-9
    1. Transition devices.
    2. Converter.
    3. Dielectric.
    4. transducer.
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.