10 CBSE QUIZ ON PERODIC CLASSIFICATION OF ELEMENTS

Welcome to your 10 CBSE QUIZ-2 MAGNETIC EFFECTS OF ELECTRIC CURRENT (PHYSICS)

Quiz on Magnetic effects of electric current

Name

Email ID

Contact No.

Choose the incorrect statement from the following regarding magnetic lines of field.

The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points.

Magnetic field lines are closed curves.

If magnetic field lines are parallel and equidistant, they represent zero field strength.

Relative strength of magnetic field is shown by the degree of closeness of the field lines.

None

Commercial electric motors do not use

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 on which the coil is wound.

None

Choose the correct option: The magnetic field inside a long straight solenoid carrying current is:

Zero

Decreases as we move towards its ends.

Increases as we move towards its ends.

The same at all points.

None

Which of the following correctly describes the magnetic field near a long straight wire?

The field consists of straight lines perpendicular to the wire

The field consists of straight lines parallel to the wire.

The field consists of radial lines originating from the wire.

The field consists of concentric circles centered on the wire.

None

To convert AC generator to DC generator

Split rings and brushes must be used.

Split ring type commentator must be used.

Rectangular wire loop is to be used.

Stronger magnetic field is to be used.

None

In a long straight solenoid, N-and S-pole are created at the two ends of the solenoid. Which of the following statements is incorrect?

The field lines inside the solenoid are in the form of straight lines indicating that magnetic field is same at all points inside the solenoid.

The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.

N-and S-poles exchange positions when the direction of the current through the solenoid is reversed.

Magnetic field produced inside the solenoid can be used to magnetise a bar of magnetic material like soft iron, when placed inside the solenoid.

None

Choose the incorrect statement.

Fleming's right-hand rule is a simple rule to know the direction of induced current.

The right-hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors.

The difference between the direct and alternating currents is that the direct current always flows in one direction, whereas the alternating current reverses its direction periodically.

In India, the AC changes direction after every 1/50 second.

None

Which of the property a proton can change when it moves freely in a magnetic field?

Mass

Speed

Velocity

None of the above

None

The strength of magnetic field inside a long current-carrying straight solenoid is

More at the ends than at the centre.

Minimum in the middle.

Same at all points.

Found to increase from one end to the other.

None

10.

The most important safety device method used for protecting electrical appliances from short circuiting or overloading is

Earthling

Use of stabilizers

Use of electric meter

Use of fuse.

None

Time's up

Time is Up!

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