1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
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
A
conservation of charge, conservation of momentum
B
conservation of energy, conservation of charge
C
conservation of momentum, conservation of charge
D
conservation of charge, conservation of energy
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-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
A
$$1$$
B
$${l \over 2}$$
C
$${l \over 4}$$
D
$$2$$
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-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
A
$$200\% $$
B
$$100\% $$
C
$$50\% $$
D
$$300\% $$
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The length of a wire of a potentiometer is $$100$$ $$cm$$, and the $$e.$$ $$m.$$ $$f.$$ of its standard cell is $$E$$ volt. It is employed to measure the $$e.m.f.$$ of a battery whose internal resistance in $$0.5\Omega .$$ If the balance point is obtained at $$1=30$$ $$cm$$ from the positive end, the $$e.m.f.$$ of the battery is

where $$i$$ is the current in the potentiometer wire.

A
$${{30E} \over {100.5}}$$
B
$${{30E} \over {\left( {100 - 0.5} \right)}}$$
C
$${{30\left( {E - 0.5i} \right)} \over {100}}$$
D
$${{30E} \over {100}} - 0.5i$$, where i is the current in the potentiometer wire
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12