AIEEE 2004 | Current Electricity Question 340 | Physics

The Kirchhoff's first law $$\left( {\sum i = 0} \right)$$ and second law $$\left( {\sum iR = \sum E} \right),$$ where the symbols have their usual meanings, are respectively based on

conservation of charge, conservation of momentum

conservation of energy, conservation of charge

conservation of momentum, conservation of charge

conservation of charge, conservation of energy

AIEEE 2004

MCQ (Single Correct Answer)

-1

A material $$'B'$$ has twice the specific resistance of $$'A'.$$ A circular wire made of $$'B'$$ has twice the diameter of a wire made of $$'A'$$. Then for the two wires to have the same resistance, the ratio $${l \over B}/{l \over A}$$ of their respective lengths must be

$$1$$

$${l \over 2}$$

$${l \over 4}$$

$$2$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

The length of a given cylindrical wire is increased by $$100\% $$. Due to the consequent decrease in diameter the change in the resistance of the wire will be

$$200\% $$

$$100\% $$

$$50\% $$

$$300\% $$

AIEEE 2003

MCQ (Single Correct Answer)

-1

A $$220$$ volt, $$1000$$ watt bulb is connected across a $$110$$ $$volt$$ mains supply. The power consumed will be

$$750$$ watt

$$500$$ watt

$$250$$ watt

$$1000$$ watt