Class 10 Practice - Level 1 - Magnetic Effects of Electric Current

Total questions: 40

A magnetic field is produced around a wire when:

Topic: Magnetic Field

It is connected to a battery

It is connected to a resistor

It is connected to a switch

It is connected to a capacitor

None

The direction of the magnetic field around a current-carrying conductor is given by:

Topic: Magnetic Field

Fleming's Left Hand Rule

Right Hand Thumb Rule

Coulomb's Law

Ampere's Law

None

The core of an electromagnet is usually made of:

Topic: Electromagnetism

Wood

Plastic

Iron

Copper

None

Increasing the number of turns in the coil of an electromagnet will:

Topic: Electromagnetism

Decrease its magnetic field

Increase its magnetic field

Have no effect on its magnetic field

Decrease the resistance of the coil

None

The force on a current-carrying conductor in a magnetic field is maximum when:

Topic: Force on a Current-Carrying Conductor

The conductor is parallel to the magnetic field

The conductor is perpendicular to the magnetic field

The conductor makes an angle of 45° with the magnetic field

There is no magnetic field

None

What is the unit of magnetic field strength?

Topic: Force on a Current-Carrying Conductor

Tesla

Newton

Joule

Ampere

None

The phenomenon of electromagnetic induction was discovered by:

Topic: Electromagnetic Induction

Michael Faraday

Isaac Newton

Albert Einstein

James Watt

None

Which of the following does NOT affect the induced emf in a coil?

Topic: Electromagnetic Induction

Number of turns in the coil

Strength of the magnetic field

Area of the coil

Temperature of the coil

None

In a domestic circuit, the fuse is connected:

Topic: Domestic Electric Circuits

In parallel with the appliance

In series with the appliance

Across the live wire

Across the neutral wire

None

10.

The main advantage of alternating current (AC) over direct current (DC) is:

Topic: Domestic Electric Circuits

AC is cheaper

AC can be easily transformed to different voltages

AC is safer

AC is more efficient

None

11.

An electric motor converts:

Topic: Electric Motor

Electrical energy into mechanical energy

Mechanical energy into electrical energy

Electrical energy into heat energy

Chemical energy into electrical energy

None

12.

Which part of the electric motor reverses the direction of current in the coil?

Topic: Electric Motor

Armature

Commutator

Brushes

Field magnet

None

13.

Which of the following devices works on the principle of electromagnetic induction?

Topic: Magnetic Effects in Electric Appliances

Electric fan

Electric bell

Transformer

Electric bulb

None

14.

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

Topic: Magnetic Effects in Electric Appliances

Zero

Decreases as we move towards the end

Increases as we move towards the end

Uniform

None

15.

Magnetic lines of force inside a bar magnet:

Topic: Magnetic Lines of Force

Intersect each other

Are parallel to each other

Form closed loops

Are absent

None

16.

The magnetic field lines due to a straight current-carrying conductor are:

Topic: Magnetic Lines of Force

Straight

Circular

Elliptical

Parabolic

None

17.

The SI unit of magnetic flux is:

Topic: Current and Magnetic Field

Weber

Tesla

Newton

Coulomb

None

18.

When a current-carrying conductor is placed in a magnetic field, it experiences a force. This phenomenon is known as:

Topic: Current and Magnetic Field

Electromagnetic induction

Magnetic flux

Electromagnetic force

Motor effect

None

19.

Electromagnetic waves are produced by:

Topic: Electromagnetic Waves

Static charges

Accelerating charges

Stationary charges

None of the above

None

20.

The speed of electromagnetic waves in a vacuum is approximately:

Topic: Electromagnetic Waves

$ \displaystyle 3\text{ }x\text{ }{{10}^{8}}m/s.$

$ \displaystyle 3\text{ }x\text{ }{{10}^{6}}m/s.$

$ \displaystyle 3\text{ }x\text{ }{{10}^{4}}m/s.$

$ \displaystyle 3\text{ }x\text{ }{{10}^{2}}m/s.$

None

21.

Which of the following uses an electromagnet?

Topic: Applications of Electromagnets

Refrigerator

Washing machine

Loudspeaker

Television

None

22.

Which device converts mechanical energy into electrical energy using electromagnetic induction?

Topic: Applications of Electromagnets

Electric motor

Generator

Transformer

Battery

None

23.

Which of the following materials is NOT attracted by a magnet?

Topic: Magnetic Properties of Materials

Iron

Nickel

Copper

Cobalt

None

24.

The property of a material by which it opposes the creation of a magnetic field within itself is called:

Topic: Magnetic Properties of Materials

Conductance

Reluctance

Resistance

Inductance

None

25.

The angle between the geographic meridian and the magnetic meridian is called:

Topic: Earth's Magnetism

Magnetic dip

Magnetic inclination

Magnetic declination

Magnetic bearing

None

26.

The horizontal component of the Earth's magnetic field is zero at the:

Topic: Earth's Magnetism

Equator

Poles

Tropic of Cancer

Tropic of Capricorn

None

27.

Which of the following medical imaging techniques uses magnets?

Topic: Magnetism in Medicine

X-ray

CT scan

MRI

Ultrasound

None

28.

Magnets are used in which of the following medical applications?

Topic: Magnetism in Medicine

Blood pressure monitoring

Chemotherapy

Magnetic therapy

Dialysis

None

29.

A current can be induced in a coil by:

Topic: Induced Current

Moving a magnet towards the coil

Keeping the magnet stationary near the coil

Moving the coil in a uniform magnetic field

All of the above

None

30.

Lenz's law is a consequence of the law of:

Topic: Induced Current

Conservation of energy

Conservation of charge

Conservation of momentum

Conservation of mass

None

31.

The magnetic field at the center of a circular loop carrying current is:

Topic: Magnetic Field Due to a Current Through a Circular Loop

Zero

Uniform

Non-uniform

Infinite

None

32.

The direction of the magnetic field inside a current-carrying solenoid is:

Topic: Magnetic Field Due to a Current Through a Circular Loop

Along the axis of the solenoid

Opposite to the current

Circular

Radial

None

33.

Magnets are used in which of the following devices?

Topic: Uses of Magnets in Daily Life

Television

Refrigerator

Telephone

All of the above

None

34.

Which of the following materials can be used to make a permanent magnet?

Topic: Uses of Magnets in Daily Life

Soft iron

Steel

Copper

Aluminium

None

35.

Two parallel conductors carrying current in the same direction will:

Topic: Magnetic Force Between Two Parallel Conductors

Attract each other

Repel each other

Have no effect on each other

Rotate around each other

None

36.

The magnetic force between two parallel conductors is used as the basis for defining the:

Topic: Magnetic Force Between Two Parallel Conductors

Coulomb

Ampere

Volt

Ohm

None

37.

The magnetic field inside a solenoid is similar to that of a:

Topic: Solenoid

Bar magnet

Circular loop

Straight conductor

Toroid

None

38.

Which of the following increases the strength of the magnetic field inside a solenoid?

Topic: Solenoid

Decreasing the number of turns

Increasing the current

Using a wooden core

Increasing the distance between turns

None

39.

The Earth’s magnetic field is believed to be caused by:

Topic: Earth’s Magnetic Field

Electric currents in the core

Gravitational forces

Movements of tectonic plates

Solar winds

None

40.

The angle of dip at the magnetic equator is:

Topic: Earth’s Magnetic Field

0°

45°

90°

180°

None

1 out of 40

Time's up

Class 10 Practice - Level 1 - Magnetic Effects of Electric Current

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