JEE Main 2013 (Offline) | Current Electricity Question 289 | Physics

The supply voltage to room is $$120V.$$ The resistance of the lead wires is $$6\Omega $$. A $$60$$ $$W$$ bulb is already switched on. What is the decrease of voltage across the bulb, when a $$240$$ $$W$$ heater is switched on in parallel to the bulb?

zero

$$2.9$$ Volt

$$13.3$$ Volt

$$10.04$$ Volt

JEE Main 2013 (Offline)

MCQ (Single Correct Answer)

-1

This questions has Statement - $${\rm I}$$ and Statement - $${\rm I}$$$${\rm I}$$. Of the four choices given after the Statements, choose the one that best describes into two Statements.

Statement - $${\rm I}$$ : Higher the range, greater is the resistance of ammeter.
Statement - $${\rm I}$$$${\rm I}$$ : To increase the range of ammeter, additional shunt needs to be used across it.

Statement - $${\rm I}$$ is true, Statement - $${\rm II}$$ is true, Statement - $${\rm II}$$ is the correct explanation of statement - $${\rm I}$$.

Statement - $${\rm I}$$ is true, Statement - $${\rm II}$$ is true, Statement - $${\rm II}$$ is not the correct explanation of statement - $${\rm I}$$.

Statement - $${\rm I}$$ is true, Statement - $${\rm II}$$ is false

Statement - $${\rm I}$$ is false, Statement - $${\rm II}$$ is true

AIEEE 2012

MCQ (Single Correct Answer)

-1

Two electric bulbs marked $$25W$$ $$-$$ $$220$$ $$V$$ and $$100W$$ $$-$$ $$220V$$ are connected in series to a $$440$$ $$V$$ supply. Which of the bulbs will fuse?

Both

$$100$$ $$W$$

$$25$$ $$W$$

Neither

AIEEE 2011

MCQ (Single Correct Answer)

-1

If a wire is stretched to make it $$0.1\% $$ longer, its resistance will:

increase by $$0.2\% $$

decrease by $$0.2\% $$

decrease by $$0.05\% $$

increase by $$0.05\% $$