Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?

Related Mcqs:

Which of the following are the passive elements?

A. Resistor B. Bulb C. Both D. None of these....

Which of the following materials has a negative temperature co-efficient of resistance?

A. Copper B. Aluminum C. Carbon D. Brass...

If a parallel circuit is opened in the main line, the current_______________?

A. increases in the branch of the lowest resistance B. increases in each branch C. is zero in all branches D. is zero in the highest resistive branch...

In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains______________?

A. length of heating element should be decreased B. length of heating element should be increased C. length of heating element has no effect on heating if water D. none of the above...

are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?

A. Varistors B. Thermistor C. Semi-conductors D. Variable resistors...