AIEEE 2004 | Current Electricity Question 320 | Physics

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

AIEEE 2003

MCQ (Single Correct Answer)

-1

A $$3$$ volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current $${\rm I}$$, in the circuit will be AIEEE 2003 Physics - Current Electricity Question 322 English