1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
The electric potential at a point in free space due to charge Q coulomb is Q $$ \times $$ 1011 volts. The electric field at that point is
A
$$4\pi {\varepsilon _0}Q \times {10^{20}}$$ volt/m
B
12$$\pi $$0Q $$ \times $$ 1022 volt/m
C
$$4\pi {\varepsilon _0}Q \times {10^{22}}$$ volt/m
D
$$12\pi {\varepsilon _0}Q \times {10^{20}}$$ volt/m
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Curie temperature above which
A
paramagnetic material becomes ferromagnetic material
B
ferromagnetic material becomes diamagnetic material
C
ferromagnetic material becomes paramagnetic material
D
paramagnetic material becomes diamagnetic material
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively
A
both remain the same
B
1.1 times, 1.1 times
C
1.2 times, 1.1 times
D
1.21 times, same
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be
A
8%
B
2%
C
4%
D
6%