1
AIEEE 2003
+4
-1
A particle of mass $$M$$ and charge $$Q$$ moving with velocity $$\overrightarrow v$$ describe a circular path of radius $$R$$ when subjected to a uniform transverse magnetic field of induction $$B.$$ The network done by the field when the particle completes one full circle is
A
$$\left( {{{M{v^2}} \over R}} \right)2\pi R$$
B
zero
C
$$B\,\,Q\,2\pi R$$
D
$$B\,Qv\,2\pi R$$
2
AIEEE 2003
+4
-1
A particle of charge $$- 16 \times {10^{ - 18}}$$ coulomb moving with velocity $$10m{s^{ - 1}}$$ along the $$x$$-axis enters a region where a magnetic field of induction $$B$$ is along the $$y$$-axis, and an electric field of magnitude $${10^4}V/m$$ is along the negative $$z$$-axis. If the charged particle continues moving along the $$x$$-axis, the magnitude of $$B$$ is
A
$${10^3}Wb/{m^2}$$
B
$${10^5}Wb/{m^2}$$
C
$${10^{16}}Wb/{m^2}$$
D
$${10^{ - 3}}Wb/{m^2}$$
3
AIEEE 2002
+4
-1
If a current is passed through a spring then the spring will
A
expand
B
compress
C
remains same
D
none of these
4
AIEEE 2002
+4
-1
If in a circular coil $$A$$ of radius $$R,$$ current $$I$$ is flowing and in another coil $$B$$ of radius $$2R$$ a current $$2I$$ is flowing, then the ratio of the magnetic fields $${B_A}$$ and $${B_B}$$, produced by them will be
A
$$1$$
B
$$2$$
C
$$1/2$$
D
$$4$$
EXAM MAP
Medical
NEET