Electric circuit and circuit diagram

Q.

What is the difference between a voltmeter and a Multimeter?

Q.

Which of the following is the symbol of a rheostat?

1. 

2. 

3. 

   or

   

4. 

Q.

What does the above symbol represent?

1. Cell

2. Battery

3. Resistor

4. Rheostat

Q.

Which of the following is the correct set-up of a circuit?

1. ​

2. ​

3. 

4.