1
AIEEE 2006
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+4
-1
The current $${\rm I}$$ drawn from the $$5$$ volt source will be AIEEE 2006 Physics - Current Electricity Question 312 English
A
$$0.33$$ $$A$$
B
$$0.5$$ $$A$$
C
$$0.67$$ $$A$$
D
$$0.17$$ $$A$$
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Two sources of equal $$emf$$ are connected to an external resistance $$R.$$ The internal resistance of the two sources are $${R_1}$$ and $${R_2}\left( {{R_1} > {R_1}} \right).$$ If the potential difference across the source having internal resistance $${R_2}$$ is zero, then
A
$$R = {R_2} - {R_1}$$
B
$$R = {R_2} \times \left( {{R_1} + {R_2}} \right)/\left( {{R_2} - {R_1}} \right)$$
C
$$R = {R_1}{R_2}/\left( {{R_2} - {R_1}} \right)$$
D
$$R = {R_1}{R_2}/\left( {{R_1} - {R_2}} \right)$$
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