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Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of 10 Advance Level Questions on Biot-Savart's Law. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A metallic loop is placed in a magnetic field. If a current is passed through it, then

•  The ring will feel a force of attraction
•  The ring will feel a force of repulsion
•  Will move to and from about its centre of gravity
•  None of these

None of these

Q2. Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2m from the centre are in the ratio 8 : 1. The radius of the coil is

•  1.0 m
•  1.0 m
•  0.15 m
•  0.2 m

1.0 m

Q3. Two concentric co-planar circular loops of radii r1 and r2 carry currents of respectively i1 and i2 in opposite directions (one clockwise and other anticlockwise). The magnetic induction at the centre of the loops is half due to i1 alone at the centre. If r2 = 2 r1, the value of i2 / i1 is

•  2
•  1/2
•  1/4
•  1

1

Q4. A circular loop is kept in that vertical plane which contains the north-south direction. It carries a current that is towards north at the topmost point. Let A be a point on the axis of the circle to the east of it and B a point on this axis to the west of it. The magnetic field due to the loop

•  Is towards east at A and towards west at B
•  Is towards west at A and towards east at B
•  Is towards east at both A and B
•  Is towards west at both A and B

Is towards west at both A and B

Q5. The magnetic field midway between two parallel current carrying wires, carrying currents i and 2i is B. If the current in the wire with current i is switched off, the magnetic field will become

•  B/3
•  2B
•  B/2
•  B/4

2B

Q6. If a current is flowing in anticlockwise direction through a coil placed in X-Y plane, then the direction of magnetic field at the centre of the coil will be

•  In X-direction
•  In Y-direction
•  Upward and perpendicular to the X-Y plane
•  Downward and perpendicular to the X-Y plane.

Upward and perpendicular to the X-Y plane

Q7. The radius of a circular coil is R. The distance on the axis from the centre of the coil where the intensity of magnetic field is 1/2√2 times that at the centre, will be

•  x = 2R
•  x = 3R/2
•  x = R
•  x = R/2

x = R

Q8. A coil carrying a heavy current and having large number of turns is mounted in a N-S vertical plane. A current flows in the clockwise direction. A small magnetic needle at its centre will have its north pole in

•  East-north direction
•  West-north direction
•  East-south direction
•  West-south direction

West-north direction

Q9. The magnetic field on the axis of a current carrying circular coil of radius a at a distance 2a from its centre will be

•  u0i/2
•  u0i/10√5a
•  u0i/4a both the electrodes
•  u0i

u0i/10√5a

Q10. One coulomb charge is attached at one end of a non-conducting rod of length 0.6m. This rod is rotated with an angular velocity of 104 Ï€ rad/s in a vertical plane about a horizontal axis passing through the other end of the rod. The magnetic field (in Tesla) at a distance of 0.8m from the centre of the path on the axis of rotation will be

•  1.13 x 10-3
•  2.26 x 10-3
•  0.113 x 10-3
•  1.13 x 10-4

1.13 x 10-3

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