The sensitivity of a potentiometer can be increased by

1.  increasing the potential gradient

2.  decreasing the length of potentiometer wire

3.  decreasing the current in the potentiometer wire

4.  all of these

A carbon resistor (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be:

1. Violet - Yellow - Orange - Silver

2. Yellow - Violet - Orange - Silver

3. Yellow - Green - Violet - Gold

4. Green - Orange - Violet - Gold

The colour code of resistance is given below:

The values of resistance and tolerance, respectively are:

1.  47 k$\mathrm{\Omega }$, 10%

2.  4.7 k$\mathrm{\Omega }$, 5%

3.  470 $\mathrm{\Omega }$, 5%

4.  470 k$\mathrm{\Omega }$, 5%

A carbon resistor has coloured strips as shown in the figure. What is its resistance?

1. $410<mspace\; width="1em"></mspace>\mathrm{\Omega }\pm 2\%$

2. $470<mspace\; width="1em"></mspace>\mathrm{\Omega }\pm 5\%$

3. $420<mspace\; width="1em"></mspace>\mathrm{\Omega }\pm 3\%$

4. $405<mspace\; width="1em"></mspace>\mathrm{\Omega }\pm 2\%$

The value of resistance for the colour code of the given resistor is:
    
1.  \((36\pm36)~k\Omega~\)
2.  \((470\pm47)~k\Omega~\)
3.  \((360\pm36)~k\Omega~\)
4.  \((360\pm18)~k\Omega~\)