1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A hollow cylinder has a charge q coulomb within it. If $$f$$ is the electric flux in units of voltmeter associated with the curved surface B, the flux linked with the plane surface A in units of V-m will be

AIPMT 2007 Physics - Electrostatics Question 45 English
A
$${q \over {2{\varepsilon _0}}}$$
B
$${\phi \over 3}$$
C
$${q \over {{\varepsilon _0}}} - \phi $$
D
$${1 \over 2}\left( {{q \over {{\varepsilon _0}}} - \phi } \right)$$
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R. The time period of rotation of the particle
A
depends on R and not on v
B
is independent of both v and R
C
depends on both v and R
D
depends on v and not on R
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show
A
anti ferromagnetism
B
no magnetic property
C
diamagnetism
D
paramagnetism.
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 amp, the efficiency of the transformer is approximately
A
50%
B
90%
C
10%
D
30%