AIEEE 2006 | Current Electricity Question 346 | Physics

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

$${300^ \circ }C$$

$${400^ \circ }C$$

$${500^ \circ }C$$

$${200^ \circ }C$$

AIEEE 2006

MCQ (Single Correct Answer)

-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

$${P \over Q} = {{2R} \over {{S_1} + {S_2}}}$$

$${P \over Q} = {{R\left( {{S_1} + {S_2}} \right)} \over {{S_1}{S_2}}}$$

$${P \over Q} = {{R\left( {{S_1} + {S_2}} \right)} \over {2{S_1}{S_2}}}$$

$${P \over Q} = {R \over {{S_1} + {S_2}}}$$

AIEEE 2006

MCQ (Single Correct Answer)

-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

flow from Antimony to Bismuth at the hot junction

flow from Bismuth to Antimony at the cold junction

now flow through the thermocouple

flow from Antimony to Bismuth at the cold junction

AIEEE 2006

MCQ (Single Correct Answer)

-1

An electric bulb is rated $$220$$ volt - $$100$$ watt. The power consumed by it when operated on $$110$$ volt will be

$$75$$ watt

$$40$$ watt

$$25$$ Watt

$$50$$ Watt