Question : The nature of fuse wire is

Option 1: high resistance and low melting point.

Option 2: high resistance and high melting point.

Option 3: low resistance and high melting point.

Option 4: low resistance and low melting point.

Question : An iron rod with a diameter of 4 cm and length of 12 cm is drawn into a wire of length 12 m of uniform thickness. Determine the thickness of the wire.

Option 1: 0.6 cm

Option 2: 0.7 cm

Option 3: 0.3 cm

Option 4: 0.4 cm

Question : certain substances loose their electrical resistance completely at super low temperature. such substance are called

Option 1: super conductors

Option 2: semi conductors

Option 3: dilectrics

Option 4: perfect conductors

Question : A copper sphere of diameter 18 cm is drawn into a wire of diameter 6 mm. Find the length of the wire.

Option 1: 143 m

Option 2: 108 m

Option 3: 324 m

Option 4: 234 m

Question : A solid copper sphere of radius 9 cm is hammered and moulded into a wire of radius 2 cm. What is the length of this wire?

Option 1: 224 cm

Option 2: 183 cm

Option 3: 198 cm

Option 4: 243 cm