Electricity
Q.1. Define electric power.
  or 
What do you understand by electric power of electrical instrument [mp 2009]
Ans. The rate of consumption of electric energy is called electric power or in other words rate of less of energy in an electric circuit is called Electric Power.

Q.2. Give an example of a liquid non-conductor of electricity.
Ans. Distilled water
Q.3. What do you mean potential of 1 volt ? [mp 2008]
Ans. The potential of a point in an electric field is said to be of 1 volt, if 1 joule work is required to be done to bring a unit positive charge from infinity to that pount. 

Q.4. Which instrument is used to measure the potential difference ?
Ans. Potential difference is measured by 'Voltmeter' .

Q.5. What is meant by 'One ampere' ? [mp 2017]
Ans. When coulomb of charge flows through cross-section area of a conductor remains uncharged then the current flows that conductor is said to the 'one ampere'.

Q.6. State Ohm's law. [mp 2016]
Ans. According to this law, "if the potential conduction of a conductor remains uncharged then the current flowing through the conductor is directly proportional to the potential difference applies its ends."

Q.7. What is electroplating ? [mp 2009, 15, 17]
Ans. The process of plating a metallic layer on the metallic substance by the process of electroplating is known as electroplating. It is based on the principle of electrolysis.

Q.8. Name the apparatus which is used for electrolysis.
Ans. Voltmeter.

Q.9. Will current flow more easily through thick wire or a thin wire of same material, when connected to the same source. why ? 
Ans. The current will flow easily through thick wire, because the resistance of conductor is inversely proportional to its area of cross section. Due to this resistance of thick wire will be less than that of thin wires so the current flow more easily through it.