Electric Current And Its Effects Mock Tests

21 questions available

Electric Current And Its Effects Mock Test 1

Questions: 21

Sample Questions

Class 8 Science

When an electric bell is activated, the electromagnet pulls which material towards it to strike the gong?

A Aluminium strip

B Iron armature

C Copper coil

D Brass bell

Class 8 Science

Which of the following is produced when an electric current flows through a wire wrapped around an iron nail?

A Light

B Sound

C Magnetic field

D Chemical change

Class 8 Science

When a current-carrying wire is placed near a compass needle, the needle deflects because:

A The wire becomes magnetic due to the flow of electric current

B The compass has its own battery

C The wire heats up the air around it

D The Earth stops exerting its magnetic force

Class 8 Science

When a current-carrying wire is placed near a compass needle, the needle deflects because:

A The wire becomes hot and affects the needle

B A magnetic field is created around the current-carrying wire

C Electric charges repel the needle

D The wire produces light that affects the needle

Class 8 Science

In an electric circuit, what does an electric switch do?

A Generates electricity

B Makes or breaks the circuit

C Increases current

D Decreases resistance

Class 8 Science

An electromagnet is formed when electric current passes through:

A A copper wire wrapped around an iron core

B A rubber band stretched between two points

C A glass rod heated in a flame

D A plastic coil connected to a battery

Class 8 Science

When an acid is added to an indicator solution, the colour change indicates:

A Temperature

B pH level

C Density

D Viscosity

Class 8 Science

An electromagnet can pick up which of the following?

A Wood pieces

B Iron pins

C Plastic beads

D Aluminium foil

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