# Moving charges and Magnetism CBSE Class 12 Physics MCQ Question with Answer Keys Solutions

If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Physics Chapterwise. In this article of AKVTutorials, you will get Moving charges and Magnetism CBSE Class 12 Physics MCQ Question with Answer Keys Solutions.

MCQ Questions for Class 12 Physics Chapter 4 Question No 11:

A double ionized He2⁺ atom travels at right angles to a magnetic field of induction 0.4 T with velocity of 10ms-1 describing a circular path of radius 5cm. A proton travelling with the same speed in the same direction in the same field will describe a circle of radius of

Option A : 10 cm

Option B : 5 cm

Option C : 20 cm

Option D : 2.5 cm

Option D : 2.5 cm

MCQ Questions for Class 12 Physics Chapter 4 Question No 12:

A proton takes 10-12 s to complete one revolution in uniform magnetic field. The time taken in another orbit of double the radius in the same field is

Option A : 0.5 × 10-12 sec

Option B : 2 × 10-12 sec

Option C : 4 × 10-12 sec

Option D : 10-12 sec

Option D : 10-12 sec

MCQ Questions for Class 12 Physics Chapter 4 Question No 13:

Two long straight conductors are held parallel to each other 7cm apart. The conductors carry currents of 9A and 16 A in opposite directions. The distance of neutral point from the conductor carrying 16 A current is

Option A : 9 cm

Option B : 16 cm

Option C : 25 cm

Option D : 63 / 25 cm

Option B : 16 cm

MCQ Questions for Class 12 Physics Chapter 4 Question No 14:

An electron of mass ‘m’ is accelerated through a potential difference of V and then it enters a magnetic field of induction B, normal to the lines of force. Then the radius of the  circular path is

Option A : √(2eV/m)

Option B : √(2Vm/eB2)

Option C : √(2Vm/eB)

Option D : √(2Vm/e2B)

Option B :√(2Vm/eB2)

MCQ Questions for Class 12 Physics Chapter 4 Question No 15:

Among the following the true statement is

Option A : Ammeter is a high resistance galvanometer and voltmeter is a low resistance galvanometer

Option B : Ammeter is a low resistance galvanometer and voltmeter is a high resistance galvanometer

Option C : Ammeter and voltmeter cannot be distinguished on the basis of their resistance

Option D : Ammeter and voltmeter have same resistance

Option B : Ammeter is a low resistance galvanometer and voltmeter is a high resistance galvanometer

MCQ Questions for Class 12 Physics Chapter 4 Question No 16:

Two long straight conductors carry currents 4A and 2 A into the plane of paper. A circular path is imagined to be enclosing these currents. The value of ∮ B.dl   is.

Option A : 6 μ0

Option B : 7 μ0

Option C : 5 μ0

Option D : 2 μ0

Option A : 6 μ0

MCQ Questions for Class 12 Physics Chapter 4 Question No 17:

The magnitude of a current in a long straight conductor to produce a flux density of 2 μT at a distance of 10cm from the conductor is

Option A : 0.5 A

Option B : 1.0 A

Option C : 0.25 A

Option D : 2.0 A

Option B : 1.0 A

MCQ Questions for Class 12 Physics Chapter 4 Question No 18:

The magnetic induction field at the center of a square of side ‘I’ and carrying a current ‘i’ is

Option A : 2√ 2μi / πl

Option B : 9μ0i / 2πl × s

Option C : 4μi/ πl

Option D : √2μ0 i / πl

Option A : 32√ 2μi / πl

MCQ Questions for Class 12 Physics Chapter 4 Question No 19:

The magnetic induction at a point on the axis of the circular coil is 1/2√2 times the magnetic induction at the center of the coil, when current is passed through the coil. If radius of the coil is 10cm then distance of that point is

Option A : 5 cm

Option B : 10 cm

Option C : 15 cm

Option D : 20 cm

Option B : 10 cm

MCQ Questions for Class 12 Physics Chapter 4 Question No 20:

An α- particle is moving in a magnetic field of (3i + 2j)T with a velocity of 5 × 105i m/s the magnetic force acting on the particle will be

Option A : 3.2 × 10-13 k dyne

Option B : 3.2 × 10-13  k N

Option C : Zero

Option D : 3.2 × 10-13  k N

Option D : 3.2 × 10-13  k N

CBSE Class 12 Physics Chapterwise MCQ
1 : Electric Charge & Fields MCQs
| 1 to 10 | 11 to 20
2 : Electrostatics Potential and Capacitance MCQs
| 1 to 10 | 11 to 20
3 : Current Electricity MCQs
| 1 to 10 | 11 to 20
4 : Moving charges and Magnetism MCQs
| 1 to 10 | 11 to 20
5 : Magnetism and Matter MCQs
| 1 to 10 | 11 to 20
6 : Electromagnetic Induction MCQs
| 1 to 10 | 11 to 20
7 : Alternating Current MCQs
| 1 to 10 | 11 to 20
8 : Electromagnetic Waves MCQs
| 1 to 10 | 11 to 20
9 : Ray Optics and Optical Instruments MCQs
| 1 to 10 | 11 to 20
10 : Wave Optics MCQs
| 1 to 10 | 11 to 20
11 : Dual Nature of Radiation MCQs
| 1 to 10 | 11 to 20
12 : Atoms MCQs
| 1 to 10 | 11 to 20
13 : Nuclei MCQs
| 1 to 10 | 11 to 20
14 : Semi Conductor Electronics MCQs
| 1 to 10 | 11 to 20
15 : Communication Systems MCQs
| 1 to 10 | 11 to 20