Aptitude Test Problems in Physics Science for Everyone by S Krotov ( PDFDrive.com )

80 Aptitude Test Problems in Physics

resistance will change if the wire is un-

wound so that the ends remain to be fixed

to the nails.

3.22. Five identical resistors (coils for hot

plates) are connected as shown in the dia-

gram in Fig. 80.

Fig. 80

What will be the change in the voltage

across the right upper spiral upon closing

the key K?

3.23. What will be the change in the resist-

ance of a circuit consisting of five identi-

A/V

Fig. 81

cal conductors if two similar conductors are

added as shown by the dashed line in

Fig. 81?

3.24. A wire frame in the form of a tetra-

hedron ADCB is connected to a d.c. source