Physics
Grade-7
Easy
Question
Which of the following solutions prevents the lightbulb in the illustration from glowing?
- Sugar solution in diluted Water
- Sodium chloride
- Silver nitrate
- Copper sulfate
Hint:
The bulb won't glow when it is connected to the sugar solution.
The correct answer is: Sugar solution in diluted Water
- A bulb connected to the solution glows only if the solution is a conductor.
- The bulb doesn't glow if the solution doesn't conduct electricity.
- The sugar solution does not conduct electricity as the sugar won't break down into ions when it is dissolved in water.
Related Questions to study
Physics
What is the name for the electrical splitting of a compound?
What is the name for the electrical splitting of a compound?
PhysicsGrade-7
Physics
Which one of the following statements is proper? Statement 1: If a little salt is dissolved in distilled water, it becomes a good conductor of electricity Statement 2: Rainwater is a conductor of electricity.
Which one of the following statements is proper? Statement 1: If a little salt is dissolved in distilled water, it becomes a good conductor of electricity Statement 2: Rainwater is a conductor of electricity.
PhysicsGrade-7
Physics
When an electric current is passed through a conducting solution, there is a change of color of the solution. This indicates
When an electric current is passed through a conducting solution, there is a change of color of the solution. This indicates
PhysicsGrade-7
Physics
Why are cans typically electroplated with tin when used to store soft drinks or food items?
Why are cans typically electroplated with tin when used to store soft drinks or food items?
PhysicsGrade-7
Physics
Which of the following solutions won't allow electricity to conduct?
Which of the following solutions won't allow electricity to conduct?
PhysicsGrade-7
Physics
Which of the following liquids is a good conductor of electricity?
Which of the following liquids is a good conductor of electricity?
PhysicsGrade-7
Physics
Electroplating is done to
Electroplating is done to
PhysicsGrade-7
Physics
Electroplating is based on
Electroplating is based on
PhysicsGrade-7
Physics
Which of the following describes an electrolyte's characteristics?
Which of the following describes an electrolyte's characteristics?
PhysicsGrade-7
Physics
In the described experimental setup, a bulb connected to the electric circuit does not glow because
In the described experimental setup, a bulb connected to the electric circuit does not glow because
PhysicsGrade-7
Physics
Which of the following is correct?
Which of the following is correct?
PhysicsGrade-7
Physics
A bulb does not glow when the probes are hanging in the air. Why?
A bulb does not glow when the probes are hanging in the air. Why?
PhysicsGrade-7
Physics
Which of the following is correct for electroplating a metal X with copper through electrolysis?
Which of the following is correct for electroplating a metal X with copper through electrolysis?
PhysicsGrade-7
Physics
In electrolytic solutions, which of the following acts as a carrier of charge?
In electrolytic solutions, which of the following acts as a carrier of charge?
PhysicsGrade-7
Physics
Which of the following statements is incorrect?
Which of the following statements is incorrect?
PhysicsGrade-7
