1
GATE EE 2003
+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
$${{\rm I} \over {2\pi d}}{\overrightarrow a _x}$$
2
GATE EE 2000
+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
$$- e\left( {E + u \times B} \right)$$
3
GATE EE 1999
+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.
4
GATE EE 1996
+1
-0.3
The energy stored in the magnetic field of solenoid $$30$$ $$cm$$ long and $$3$$ $$cm$$ diameter wound with $$1000$$ turns of wire carrying a current of $$10$$ $$A$$ is
A
$$0.015\,\,J$$
B
$$0.15$$ $$J$$
C
$$0.5$$ $$J$$
D
$$1.15$$ $$J$$
EXAM MAP
Medical
NEET