1
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
The inductance of a long solenoid of length $$1000$$ $$mm$$ wound uniformly with $$3000$$ turns on a cylindrical paper tube of $$60$$ $$mm$$ diameter is
A
$$3.2\,\,\mu H$$
B
$$3.2\,\,mH$$
C
$$32.0\,\,mH$$
D
$$3.2\,\,H$$
2
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
Two conductors are carrying forward and return current of $$ + {\rm I}$$ and $$ - {\rm I}$$ as shown in Fig.

The magnetic field intensity $$\overrightarrow H $$ at point $$P$$ is

A
$${{\rm I} \over {\pi d}}{\overrightarrow a _y}$$
B
$${{\rm I} \over {\pi d}}{\overrightarrow a _x}$$
C
$${{\rm I} \over {2\pi d}}{\overrightarrow a _y}$$
D
$${{\rm I} \over {2\pi d}}{\overrightarrow a _x}$$
3
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
An electron with velocity $$'u'$$ is placed in an electric field, $$E$$ and magnetic field, $$B.$$ The force experienced by the electron is given by
A
$$ - eE$$
B
$$ - eu \times B$$
C
$$ - e\left( {u \times E + B} \right)$$
D
$$ - e\left( {E + u \times B} \right)$$
4
GATE EE 1999
MCQ (Single Correct Answer)
+1
-0.3
Two parallel wires separated by a distance $$'d'$$ are carrying a current $$'{\rm I}'$$ in the same direction. The magnetic field along a line running parallel to these wires at midway between them
A
depends upon $$'{\rm I}'$$
B
is zero
C
depends upon $$'d'$$
D
depends upon the permeability of medium between the wires.
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