# Case Study MCQ Questions Chapter 13 Magnetic Effect of Electric Current Class 10 Science

Please see below Case Study MCQ Questions Chapter 13 Magnetic Effect of Electric Current Class 10 Science. These MCQ Questions with Answers for Case study have been designed as per the latest syllabus and examination guidelines of Class 10 Science. Cased Study Based MCQ Questions for Class 10 Science are expected to come in the upcoming exams. We have provided a lot of case studies for all chapters in standard 10 science. Please solve the MCQ Questions and compare with the answers provided by our teachers.

## Chapter 13 Magnetic Effect of Electric Current Class 10 Science Case Study MCQ Questions

For a conductor of length L carrying a current of I in a field B the force experienced by the conductor = ×  F I B
If the current-carrying conductor in the form of a loop of any arbitrary shape is placed in a uniform field, then, F 0 → = i.e., the net magnetic force on a current loop in a uniform magnetic field is always zero. Here it must be kept in mind that in this situation different parts of the loop may experience elemental force due to which the loop may be under tension or may experience a torque. Direction of force can be determined by fleming’s left hand rule, right hand palm rule or screw rule.

Question. A wire is lying horizontally in the north-south direction and there is a horizontal magnetic field pointing towards the east. Some positive charges in the wire move north and an equal number of negative charges move south. The direction of force on the wire will be

(a) east
(b) down, into the page
(c) up, out of the page
(d) west

B

Question. Four situations are given below-
I. An infinitely long wire carrying current
II. A rectangular loop carrying current
III. A solenoid of finite length carrying current
IV. A circular loop carrying current.
In which of the above cases will the magnetic field produced be like that of a bar magnet?
(a) I
(b) I and III
(c) Only III
(d) Only IV

C

Question. The direction of induced current is obtained by
(a) Fleming’s left hand rule
(b) Maxwell’s cork-screw rule
(c) Ampere’s rule
(d) Fleming’s right hand rule

D

Question. An electron moving with uniform velocity in x-direction enters a region of uniform magnetic field along y-direction. Which of the following physical quantity(ies) is (are) non-zero and remain constant?

I. Velocity of the electron
II. Magnitude of the momentum of the electron.
III. Force on the electron.
IV. The kinetic energy of electron.
(a) Only I and II.
(b) Only III and IV.
(c) All four
(d) Only II and IV.

D

Question. Which of the following can produce a magnetic field?
(a) Electric charges at rest
(b) Electric charges in motion
(c) Only by permanent magnets
(d) Electric charges whether at rest or in motion

B

The strength of the magnetic field produced by a currentcarrying circular coil (or circular wire) depends on (i) Current flowing through the coil. (ii) Radius of the circular coil. (iii) Number of turns of wire in the circular coil.

Question. If a current carrying straight conductor is placed is east-west direction, then the direction of the force experienced by the conductor due to earth’s magnetic field is:
(a) downward
(b) upward
(c) east-west
(d) west east

A

Question. A long horizontal power line is carrying a current of 100 A in the east-west direction. The direction of magnetic field at a point 1.0 m below it is
(a) south to north
(b) north to south
(c) east to west
(d) west to east

B

Question. What type of curve we get, between magnetic field and distance along the axis of a current carrying circular coil?
(a) Straight
(b) Circular
(c) Parabolic
(d) None of these

D

A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic field with respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere.

Question. After analysing the graph a student writes the following statements.
I. The magnetic field produced by the solenoid is inversely proportional to the current.
II. The magnetic field produced by the solenoid is directly proportional to the current.
III. The magnetic field produced by the solenoid is directly proportional to square of the current.
IV. The magnetic field produced by the solenoid is independent of the current.
Choose from the following which of the following would be the correct statement(s).
(a) Only IV
(b) I and III and IV
(c) I and II
(d) Only II

D

Question. What type of energy conversion is observed in a linear solenoid?
(a) Mechanical to Magnetic
(b) Electrical to Magnetic
(c) Electrical to Mechanical
(d) Magnetic to Mechanical

C

Question. From the graph deduce which of the following statements is correct.
(a) For a current of 0.8A the magnetic field is 13 mT
(b) For larger currents, the magnetic field increases nonlinearly.
(c) For a current of 0.8A the magnetic field is 1.3 mT
(d) There is not enough information to find the magnetic field corresponding to 0.8A current.

A

Question. The magnetic field lines produced inside the solenoid are similar to that of …
(a) a bar magnet 10
(b) a straight current carrying conductor
(c) a circular current carrying loop
(d) electromagnet of any shape