1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potential difference in volts should be applied across them so that the magnetic field at their centres is the same?
A
2
B
3
C
4
D
6
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
A very long straight wire carries a current $$I$$. At the instant when a charge +Q at point P has velocity $$\overrightarrow v $$, as shown, the force on the charge is

AIPMT 2005 Physics - Moving Charges and Magnetism Question 32 English
A
along Oy
B
opposite to Oy
C
along Ox
D
opposite to Ox
3
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
An electron moves in a circular orbit with a uniform speed v. It producess a magnetic field B at the centre of the circle. The radius of the circle is proportional to
A
$$\sqrt {B/v} $$
B
$$B/v$$
C
$$\sqrt {v/B} $$
D
$$v/B$$
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
To convert a galvanometer into a voltmeter one should connect a
A
high resistance in series with galvanometer
B
low resistance in series with galvanometer
C
high resistance in parallel wilh galvanometer
D
low resistance in parallel with galvanometer.
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