BASIC ELECTRICAL PRACTICE - Quiz

1) Calculate the value of resistance connected to the supply voltage of 100V and current through 4 A?

0.4 ohm 0.04 ohm 25 ohm 400 ohm

2) What is the S.I unit of specific resistance?

Ohm/cm Ohm/metre² Ohm-metre Micro ohm/cm²

3) What is the specific resistance value of copper conductor?

1.72 micro ohm/cm² 1.72 micro ohm 1.72 ohm /cm² 1.72 micro ohmmeter

4) What is the effect in resistance of the conductor, if its diameter is doubled?

Increase to two times Increase to four times Decrease to half the value Decrease to 1/4 th value

5) Which is directly proportional to the resistance?

Area of cross section Length Resistivity Temperature