Short Quiz

Question 1 of 5

CBSE Past Year 2026

A coil having 100 closely wound turns and area of cross-section 300 m\(m^{2}\) carries a current of 5 mA. The magnitude of the magnetic moment associated with the coil is :

A 6 × \(10^{−4}\) A\(m^{2}\) B 3 × \(10^{−5}\) A\(m^{2}\) C 1·5 × \(10^{−4}\) A\(m^{2}\) D 5 × \(10^{−5}\) A\(m^{2}\)

Select one option. Answers are shown after the test.

Question 2 of 5

CBSE Past Year 2026

A long straight wire of circular cross-section (radius a) carries a steady current I. The current is uniformly distributed across this cross-section. The magnitude of the magnetic field produced at a point at a distance (a/2) from the axis of the wire will be

A Zero B \(\frac{μ_{0}I}{2πa}\) C \(\frac{μ_{0}I}{4πa}\) D \(\frac{μ_{0}I}{6πa}\)

Select one option. Answers are shown after the test.

Question 3 of 5

CBSE Past Year 2026

An electron moves around the nucleus in a circular orbit of radius r and makes n revolutions per second. The value of equivalent current in the orbit is :

A \(\frac{e}{n}\) B ne C \(\frac{ne}{r}\) D \(\frac{e}{nr}\)

Select one option. Answers are shown after the test.

Question 4 of 5

CBSE Past Year 2026

Four long straight thin wires are held vertically at the corners A, B, C and D of a square of side ‘a’, kept on a table and carry equal current ‘I’. The wire at A carries current in upward direction whereas the current in the remaining wires flows in downward direction. The net magnetic field at the centre of the square will have the magnitude :

Diagram for question 3

A \(\frac{μ_{0} I}{πa}\) and directed along OC B \(\frac{μ_{0} I}{πa \sqrt{2}}\) and directed along OD C \(\frac{μ_{0} I \sqrt{2}}{πa}\) and directed along OB D \(\frac{2 μ_{0} I}{πa}\) and directed along OA

Select one option. Answers are shown after the test.

Question 5 of 5

CBSE Past Year 2026

Two particles of masses \(m_{1}\) and \(m_{2}\) having charges \(q_{1}\) and \(q_{2}\) respectively are projected with the same velocity in a region of uniform magnetic field \(\vec{B}\) pointing vertically upward. If they describe circular paths as shown in the figure, one may conclude that :

Diagram for question 2

A \(\frac{m_{1}}{m_{2}}\) > \(\frac{q_{1}}{q_{2}}\) B \(\frac{m_{1}}{m_{2}}\) > \(\frac{q_{2}}{q_{1}}\) C \(\frac{m_{1}}{m_{2}}\) < \(\frac{q_{1}}{q_{2}}\) D \(\frac{m_{1}}{m_{2}}\) < \(\frac{q_{2}}{q_{1}}\)

Select one option. Answers are shown after the test.

Class 6

Class 7

Class 8

Class 9

Class 10

Class 11

Class 12

Courses

Interesting

Popular

Class 6

Class 7

Class 8

Class 9

Class 10

Class 11

Class 12

Courses

Interesting

Popular