Science : Ch 13 – Magnetic Effects of Electric Current

This test is designed based on NCERT Syllabus for Class 10 Topics : Magnetic Effects of Electric Current

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

A current-carrying conductor is clench in totally vertical direction. In order to produce a clockwise magnetic feld around the conductor, the current should passed in the conductor:

from top towards bottom

from left towards right

from bottom towards top

from right towards left

2 / 15

Inside the magnet, the field lines move from :

from south to north

from north to south

away from north pole

away from south poles

3 / 15

Commercial electric motors neglect :

An electromagnet to rotate the armature

Effectively large number of turns of conducting wire in the current carrying coil

A permanent magnet to rotate the armature

A soft iron core on which the coil is wound

4 / 15

The magnetic feld inside a long straight solenoid carrying current is:

uneven

zero

same at all points

None of these

5 / 15

Which of the following declaration is not correct about the magnetic field?

Magnetic field lines form a continuous closed curve

Magnetic field line do not interest each other

Direction of tangent at any point on the magnetic field line curve gives the direction of magnetic field at that point.

Outside the magnet, magnetic field lines go from South to North pole of the magnet.

6 / 15

A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid:

will decrease

will remains same

will increase

will become zero

7 / 15

Which of the following component influence the strength of force experience by a current carrying conduct in a uniform magnetic field?

magnetic field strength

magnitude of current in a conductor

length of the conductor within magnetic field

All of above

8 / 15

Direction of rotation of a coil in electric motor is intent by:

fleming’s right hand rule

fleming’s left hand rule

faraday law of electromagnetic inductors

None of these

9 / 15

Overloading is caused to:

Insulation of wire is damaged

fault in the appliances

accidental hike in supply voltage

All of the above

10 / 15

The current which is created due to the relative motion of coil or magnet

induced electric power

induced electric current

induced electric resistance

none

11 / 15

when an iron core is inserted into a current carrying solenoid

strength of the magnetic field produced inside the solenoid remains unchanged

strength of the magnetic field produced inside the solenoid decreases

strength of the magnetic field produced inside the solenoid increases

no effect

12 / 15

The commercial motors use a soft iron core on which the coil is wound because

to increase the power of the electric motor

to decrease the power of the electric motor

to reduce the power of the electric motor.

none

13 / 15

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along

x axis

y axis

–ve z-direction

+ve z-direction

14 / 15

The phenomenon discovered by Faraday.

electromagnetic induction

Electromagnetic conduction

Electromagnetic repulsion

Electromagnetism

15 / 15

Two magnetic feld lines never intersect because the resultant force on a north pole at any point can only be in

uni direction

bidirection

multidirection

none

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Science : Ch 13 – Magnetic Effects of Electric Current

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