If a coil of cable 50m in length has a conductor resistance of 0.275 Ohm, calculate the value for 800m of the same cable.

4.4 Ohm

1 of 8

Calculate the resistance of a single core copper cable 200m long and 25mm2 CSA. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

0.138 Ohm

2 of 8

Determine the resistance of 150m of single copper cable whose CSA is 10mm2. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

0.258 Ohm

3 of 8

Calculate the resistance of 75m of single aluminium cable whose CSA is 4mm2. Take the resistivity of aluminium to be 2.65 x 10-8 ohm/metre3.

0.5 Ohm

4 of 8

Find the CSA of a single copper cable 500m long, which carries a current of 2.5 amperes and has a volt drop of 3.58 volts. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

6mm2

5 of 8

Calculate the resistance of a 4mm2 CSA twin copper cable feeding a motor 150m away. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

0.645 Ohm

6 of 8

A motor takes 45A from a 230v supply. A twin aluminium cable 40m in length feeds the motor, each core having a CSA of 16mm2. Calculate the voltage at the motor terminals. Take the resistivity of aluminium to be 2.65 x 10-8 ohm/metre3.

224.0375 Volts

7 of 8

Two cables have equal resistance but one has a CSA 2.5 times larger than the other. How much longer is the thicker cable than the thinner cable?

2.5 times

8 of 8

Other cards in this set

Card 2

Front

Calculate the resistance of a single core copper cable 200m long and 25mm2 CSA. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

Back

0.138 Ohm

Card 3

Front

Determine the resistance of 150m of single copper cable whose CSA is 10mm2. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

Back

Card 4

Front

Calculate the resistance of 75m of single aluminium cable whose CSA is 4mm2. Take the resistivity of aluminium to be 2.65 x 10-8 ohm/metre3.

Back

Card 5

Front

Find the CSA of a single copper cable 500m long, which carries a current of 2.5 amperes and has a volt drop of 3.58 volts. Take the resistivity of copper to be 1.72 x 10-8 ohm/metre3.

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