1
AIEEE 2006
+4
-1
In a Wheatstone's bridge, three resistance $$P, Q$$ and $$R$$ connected in the three arms and the fourth arm is formed by two resistances $${S_1}$$ and $${S_2}$$ connected in parallel. The condition for the bridge to be balanced will be
A
$${P \over Q} = {{2R} \over {{S_1} + {S_2}}}$$
B
$${P \over Q} = {{R\left( {{S_1} + {S_2}} \right)} \over {{S_1}{S_2}}}$$
C
$${P \over Q} = {{R\left( {{S_1} + {S_2}} \right)} \over {2{S_1}{S_2}}}$$
D
$${P \over Q} = {R \over {{S_1} + {S_2}}}$$
2
AIEEE 2006
+4
-1
The resistance of bulb filmanet is $$100\Omega$$ at a temperature of $${100^ \circ }C.$$ If its temperature coefficient of resistance be $$0.005$$ per $$^ \circ C$$, its resistance will become $$200\,\Omega$$ at a temperature of
A
$${300^ \circ }C$$
B
$${400^ \circ }C$$
C
$${500^ \circ }C$$
D
$${200^ \circ }C$$
3
AIEEE 2006
+4
-1
The current $${\rm I}$$ drawn from the $$5$$ volt source will be
A
$$0.33$$ $$A$$
B
$$0.5$$ $$A$$
C
$$0.67$$ $$A$$
D
$$0.17$$ $$A$$
4
AIEEE 2005
+4
-1
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
A
four times
B
doubled
C
halved
D
one fourth
EXAM MAP
Medical
NEET