Conductors and Insulators

Q.

Abhishek decides he knows enough about how stuff works to fix his TV. He then proceeds to turn the switch on and put his finger in the socket. Before the resulting electric shock causes any serious consequential damage, Himanshu decides to violently smash Abhishek’s hand away to save his life. Which of the following objects must he use to ensure he doesn't put himself in any kind of danger while maximizing Abhishek's chances of surviving?

1. A piece of cloth from the wardrobe upstairs

2. Abhishek's expensive Louis Vuitton leather bag, also lying around

3. His own bare, muscular, hairy hands

4. A stainless-steel rod that just randomly happens to be lying around

Q.

1. Uniformly but only on surface

2. Only on surface but non-uniformly

3. Uniformly inside the volume

4. Non-uniformly inside the volume

Q. A body can be negatively charged by

1. Removing some electrons from it
2. Giving some protons to it
3. Removing some neutrons from it
4. Giving excess of electrons to it

Q. Bulb does not glow when the probs are hanged in air. The reason is:

1. air is a bad conductor of electricity
2. air absorbs the electricity
3. electricity is discharged into air
4. air disperses the electricity

Q. Alcohol and ether are conducting liquids of electricity.

1. True
2. False

Q. In conductors electrons can flow because their

1. electrons are free and mobile
2. ions are free
3. protons are free
4. negative ions are free

Q. From below which is the example of insulators.

1. Metallic elements
2. Non Metallic elements
3. graphite
4. acqueous solution of salt

Q. Pure water is a good conductor of electricity.

1. True
2. False

Q. An example in which light emitting diodes are used is :

1. calculator
2. hard drive
3. optical drive
4. analog watch

Q. The materials that do not allow flow of electron through them are known as :

1. insulators
2. conductors
3. semi conductors
4. electrolytes