1
AIEEE 2006
+4
-1
A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will
A
flow from Antimony to Bismuth at the hot junction
B
flow from Bismuth to Antimony at the cold junction
C
now flow through the thermocouple
D
flow from Antimony to Bismuth at the cold junction
2
AIEEE 2006
+4
-1
An electric bulb is rated $$220$$ volt - $$100$$ watt. The power consumed by it when operated on $$110$$ volt will be
A
$$75$$ watt
B
$$40$$ watt
C
$$25$$ Watt
D
$$50$$ Watt
3
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
$${P \over Q} = {R \over {{S_1} + {S_2}}}$$
4
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
$${200^ \circ }C$$
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