Match the following: Column A Column B 1. Music player a. Communicates with the world 2. Smart phone b. Stores data 3. Electric torch c. Play games 4. Pendrive d. Provides light 5. Tablet e. Plays music

1-e A music player is used to play music. It stores and plays thousands of songs. 2-a A smartphone is an electronic gadget that can be used for multiple uses such as to communicate, to browse, to play games, to learn, etc. 3-d An electric torch is an appliance that gives the light. It is an example of an artificial source of light. 4-b Pen drive is a small electronic gadget for storing and transferring any file from a computer. 5-c People use tablets to read books, play games and watch videos. Column A Column B 1. Music player e. Plays music 2. Smartphone a. Communicates with the world 3. Electric torch d. Provides light 4. Pen drive b. Stores data 5. Tablet c. Play games

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Which company launched the first commercial mobile phone?

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Important Questions on Current Electricity

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Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

In case two cells are identical, each of emf $E = 5 V$ and internal resistance $r = 2 Ω$ , calculate the voltage across the external resistance $R = 10 Ω$

HARD

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

Two cells of emf

E_{1}

and

E_{2}

have their internal resistance

r_{1}

and

r_{2}

respectively. Deduce an expression for the equivalent emf and internal resistance of their parallel combination when connected across an external resistance

R

assume that the two cells are supporting each other.

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

A donor impurity results in

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

E-mail stands for electric mail.

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

List the gadgets you have used.

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

The _____ is the fastest means of communication. (telephone/letter)

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

Sending messages through e-mail is faster than telephones.

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

Web links act as address in Internet.

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Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

An email is the latest and fastest means of written communication.

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

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Make a list of similar acts that you know.

EASY

Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

WWW is related to ____.

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Physics>Electricity and Magnetism>Current Electricity>Cells, EMF, Internal Resistance

Match the following:

Column A	Column B
1. Music player	a. Communicates with the world
2. Smart phone	b. Stores data
3. Electric torch	c. Play games
4. Pendrive	d. Provides light
5. Tablet	e. Plays music