1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Two long conductors, separated by a distance $$d$$ carry current $${I_1}$$ and $${I_2}$$ in the same direction. They exert a force $$F$$ on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to $$3d$$. The new value of the force between them is
A
$$ - {{2F} \over 3}$$
B
$${F \over 3}$$
C
$$-2F$$
D
$$ - {F \over 3}$$
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The materials suitable for making electromagnets should have
A
high retentivity and low coercivity
B
low retentivity and low coercivity
C
high retentivity and high coercivity
D
low retentivity and high coercivity
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Alternating current can not be measured by $$D.C.$$ ammeter because
A
Average value of current for complete cycle is zero
B
$$A.C.$$ Changes direction
C
$$A.C.$$ can not pass through $$D.C.$$ Ammeter
D
$$D.C.$$ Ammeter will get damaged.
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
In an $$LCR$$ series $$a.c.$$ circuit, the voltage across each of the components, $$L,C$$ and $$R$$ is $$50V$$. The voltage across the $$L.C$$ combination will be :
A
$$100V$$
B
$$50\sqrt 2 $$
C
$$50$$ $$V$$
D
$$0$$ $$V$$ (zero)
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