1
AIEEE 2012
+4
-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?
A
Both
B
$$100$$ $$W$$
C
$$25$$ $$W$$
D
Neither
2
AIEEE 2011
+4
-1
If a wire is stretched to make it $$0.1\%$$ longer, its resistance will:
A
increase by $$0.2\%$$
B
decrease by $$0.2\%$$
C
decrease by $$0.05\%$$
D
increase by $$0.05\%$$
3
AIEEE 2010
+4
-1
Two conductors have the same resistance at $${0^ \circ }C$$ but their temperature coefficients of resistance are $${\alpha _1}$$ and $${\alpha _2}.$$ The respective temperature coefficients of their series and parallel combinations are nearly
A
$${{{\alpha _1} + {\alpha _2}} \over 2},\,{\alpha _1} + {\alpha _2}$$
B
$${\alpha _1} + {\alpha _2},\,{{{\alpha _1} + {\alpha _2}} \over 2}$$
C
$${\alpha _1} + {\alpha _2},\,{{{\alpha _1}{\alpha _2}} \over {{\alpha _1} + {\alpha _2}}}$$
D
$${{{\alpha _1} + {\alpha _2}} \over 2},\,{{{\alpha _1} + {\alpha _2}} \over 2}$$
4
AIEEE 2008
+4
-1
Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.

The value of the unknown resister $$R$$ is

A
$$13.75\Omega$$
B
$$220\Omega$$
C
$$110\Omega$$
D
$$55\Omega$$
EXAM MAP
Medical
NEET