Electricity: Magnetic and Heating Effects
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Electric Cell, Bulb, and Simple Circuits
SubtopicElectric Cell, Bulb, and Simple Circuits under Electricity: Magnetic and Heating Effects for Grade 6 CBSE.
Preview questions (no answers)
- 1.
In the simple electric circuit shown below, what is the primary function of the component labeled as a cell?
A.To stop the flow of current
B.To act as a source of electric energy
C.To convert electricity into light
D.To provide a path for the current to flow
- 2.
Identify the component in the given electric circuit that converts electrical energy into light energy.
A.Connecting wire
B.Electric cell
C.Switch
D.Electric bulb
- 3.
In a bulb, where are the two terminals located?
A.Both at the top of the glass
B.One at the base and one on the metal casing
C.Both on the filament
D.There are no terminals in a bulb
- 4.
What is a combination of two or more cells called?
A.A Mega-cell
B.A Battery
C.A Generator
D.A Switch
- 5.
Why is an electromagnet better than a permanent magnet for cranes in junk yards?
A.It is cheaper
B.It can be turned on and off to drop objects
C.It is always stronger
D.It does not require electricity
- 6.
If the filament of a bulb is broken, the bulb is said to be:
A.Fused
B.Charged
C.Short-circuited
D.On
- 7.
A safety device that breaks the circuit if too much current flows through it is called a:
A.Switch
B.Cell
C.Fuse
D.Battery
- 8.
Rohan is trying to understand why his toy car's motor isn't working. He observes the circuit and realizes the path is broken. He decides to use a 'switch' to bridge the gap. If he uses the configuration shown in the diagram, what must happen for the electric current to flow from the positive terminal to the negative terminal of the cell?
A.The switch must be in the 'OFF' position to allow the charges to accumulate
B.The switch must be moved to the 'ON' position to provide a continuous conducting path
C.The battery must be turned around so both terminals face the lamp
D.The filament inside the bulb must be broken to allow the current to jump the gap
- 9.
Anika wants to create a simple 'open-close' tester for her science fair. She sets up a circuit with a bulb, a cell, and two metal pins. She places an object between the pins to see if the bulb glows. While testing a specific material, she notices the bulb does not light up. Looking at the circuit layout, which of the following materials is most likely placed between points A and B to cause this result?
A.A steel paperclip
B.A graphite pencil lead
C.A dry wooden popsicle stick
D.A copper safety pin
- 10.
Aarav is building a project where he wants to control two light bulbs independently using a single battery. He notices that when he connects them in a specific way, removing one bulb causes the other to stop glowing immediately. Based on the circuit diagram provided, which modification should Aarav make to ensure that one bulb stays lit even if the other is unscrewed?
A.Connect the bulbs in parallel by giving each its own separate path to the battery
B.Add a second battery in the same loop to increase the voltage
C.Replace the copper wires with thicker rubber bands to improve insulation
D.Connect both bulbs to the same terminal of the battery using a single wire
Download the worksheet for Electricity: Magnetic and Heating Effects - Electric Cell, Bulb, and Simple Circuits to practice offline. It includes additional chapter-level practice questions.
Conductors and Insulators
SubtopicConductors and Insulators under Electricity: Magnetic and Heating Effects for Grade 6 CBSE.
Preview questions (no answers)
- 1.
Which of the following objects will complete the circuit if placed between the terminals?
A.A piece of charcoal
B.A gold chain
C.A wax candle
D.A silk ribbon
- 2.
What is the result of the magnetic effect of current in a coil of wire?
A.The wire melts
B.The wire acts like a magnet
C.The wire turns into an insulator
D.The wire stops the current
- 3.
Which of these is a safe practice when dealing with electricity?
A.Touching a switch with wet hands
B.Using a tester to check wires
C.Inserting metal objects into sockets
D.Pulling a wire to unplug a device
- 4.
A compass needle is a small:
A.Electric cell
B.Magnet
C.Light bulb
D.Insulator
- 5.
An electromagnet is a:
A.Permanent magnet
B.Natural magnet
C.Temporary magnet
D.Non-magnetic material
- 6.
What is the main reason for using insulators like porcelain or plastic in electrical switches?
A.To make the switch look shiny
B.To increase the current flow
C.To protect the user from electric shock
D.To allow the switch to heat up
- 7.
The magnetic effect of electric current was first observed by noticing the deflection of a:
A.Steel ruler
B.Bar magnet
C.Compass needle
D.Glass rod
- 8.
If the insulation on the wires of an electric iron is damaged and the 'live' wire touches the metallic base, what is the most likely outcome if the iron is properly earthed?
A.The iron will heat up faster.
B.The iron will become a strong permanent magnet.
C.The fuse will blow or the MCB will trip, cutting off the power.
D.The electricity will turn into light.
- 9.
A student wants to make a powerful electromagnet. Which combination should they choose?
A.10 turns of wire, 1.5V battery, plastic core.
B.50 turns of wire, 9V battery, steel core.
C.100 turns of wire, 9V battery, soft iron core.
D.100 turns of wire, 1.5V battery, wooden core.
- 10.
Which of the following is NOT a safety measure in electrical circuits?
A.Using an MCB.
B.Using a fuse.
C.Earthing the metallic body of appliances.
D.Using a thick copper wire in place of a fuse.
Download the worksheet for Electricity: Magnetic and Heating Effects - Conductors and Insulators to practice offline. It includes additional chapter-level practice questions.
Heating Effect of Electric Current
SubtopicHeating Effect of Electric Current under Electricity: Magnetic and Heating Effects for Grade 6 CBSE.
Preview questions (no answers)
- 1.
To prevent electric fires, every building should have ________ installed in all electrical circuits.
A.Heaters
B.Fuses or MCBs
C.Nichrome wires
D.Incandescent bulbs
- 2.
When current is switched ON in a room heater, the element becomes:
A.Red hot and gives out heat
B.Cold and blue
C.Wet
D.Transparent
- 3.
If the insulation on wires is damaged and they touch each other, it results in a:
A.Open circuit
B.Short circuit
C.High efficiency circuit
D.Closed loop
- 4.
The amount of heat produced in a wire depends on its material, ________, and thickness.
A.Color
B.Length
C.Weight
D.Price
- 5.
When current exceeds the safety limit, the fuse wire melts. This is because the heat produced is proportional to the:
A.Square of the current
B.Square root of the current
C.Color of the wire
D.Atmospheric pressure
- 6.
In an electric fuse, which of these is the most important part that responds to the heating effect?
A.The porcelain holder
B.The metal terminals
C.The fuse wire
D.The glass casing
- 7.
What is the result of 'Joule heating' in an electric motor?
A.It makes the motor spin faster
B.It is wasted energy that causes the motor to warm up
C.It produces the magnetic field needed for rotation
D.It prevents the motor from wearing out
- 8.
Why does a bulb filament glow but the house wiring does not?
A.The house wiring is made of plastic.
B.The house wiring has much lower resistance and higher melting point than the filament.
C.Electricity only produces heat when it reaches the end of the circuit.
D.The filament contains a special gas that creates light, not the current.
- 9.
Which of these materials would likely be found inside a fuse specifically designed for high-voltage industrial use?
A.A mixture of lead and tin
B.Pure gold wire
C.A thick rubber band
D.Wet cotton thread
- 10.
If you use a 15A fuse for a circuit meant for a 5A air conditioner, what risk are you taking?
A.The air conditioner will not get enough power to start.
B.The fuse will blow too often during normal operation.
C.In case of a fault, the fuse may not blow, allowing the AC to catch fire.
D.The electricity meter will run three times faster.
Download the worksheet for Electricity: Magnetic and Heating Effects - Heating Effect of Electric Current to practice offline. It includes additional chapter-level practice questions.
Magnetic Effects and Electromagnets
SubtopicMagnetic Effects and Electromagnets under Electricity: Magnetic and Heating Effects for Grade 6 CBSE.
Preview questions (no answers)
- 1.
A student wants to use an electromagnet instead of a permanent magnet to make a navigation compass for a hiking trip. Based on the provided flowchart, what is a major disadvantage of this design?
A.The compass will point toward the person holding it instead of North.
B.The compass will only work as long as the battery has power.
C.The electromagnet will make the compass too heavy to carry.
D.The compass will only work during the daytime.
- 2.
When building an electromagnet, the wire should be wound around the nail in which fashion?
A.In a messy tangled pile
B.In neat, continuous loops (coils)
C.Only at the two ends of the nail
D.Parallel to the nail without touching it
- 3.
What is the purpose of the 'contact screw' in an electric bell?
A.To hold the bell to the wall
B.To complete and break the circuit to make the bell ring repeatedly
C.To provide electricity to the bell
D.To make the gong look shiny
- 4.
The discovery of the magnetic effect of current showed a link between:
A.Electricity and Magnetism
B.Electricity and Sound only
C.Magnetism and Sunlight
D.Gravity and Electricity
- 5.
What is the role of the battery in an electromagnet setup?
A.To provide the iron core
B.To provide the source of electric current
C.To measure the magnetic strength
D.To insulate the wires
- 6.
In Oersted's experiment, the deflection of the compass needle proved that:
A.Electricity and magnetism are unrelated
B.Electricity can produce magnetism
C.Magnetism can produce heat
D.Compass needles are made of copper
- 7.
Which of the following describes the behavior of a current-carrying coil?
A.It attracts all metals including gold
B.It behaves like a bar magnet with North and South poles
C.It only attracts materials when the current is off
D.It loses its magnetic property when iron is inserted
- 8.
In a 'Hard' scientific sense, why does adding an iron core into a solenoid increase the magnetic field strength so drastically?
A.The iron core creates its own electricity
B.The iron core has a high 'permeability', which means it provides an easier path for magnetic field lines to follow and aligns its internal domains
C.The iron core acts as a cooling agent, allowing more current to flow
D.The iron core physically pushes the magnetic field out of the wire
- 9.
Which of these statements accurately describes the difference between the magnetic effects of a single straight wire and a coil of wire?
A.A straight wire has no magnetic field, while a coil does
B.A straight wire has a magnetic field that forms concentric circles, while a coil concentrates these fields to act like a bar magnet
C.A coil of wire only has a magnetic field if it has an iron core, but a straight wire does not need one
D.A straight wire's magnetic field is stronger than a coil's magnetic field
- 10.
In some specialized electromagnets, 'Superconductors' are used. These are materials that have zero resistance at very low temperatures. Why would this be useful for a powerful electromagnet?
A.It allows a massive amount of current to flow without any energy loss as heat, creating a very strong field
B.It makes the electromagnet work even without a battery
C.It changes the magnetic field into light
D.It prevents the electromagnet from attracting iron
Download the worksheet for Electricity: Magnetic and Heating Effects - Magnetic Effects and Electromagnets to practice offline. It includes additional chapter-level practice questions.
Magnets: Discovery, Poles, and Attraction/Repulsion
SubtopicMagnets: Discovery, Poles, and Attraction/Repulsion under Electricity: Magnetic and Heating Effects for Grade 6 CBSE.
Preview questions (no answers)
- 1.
Which of these is the most common shape for a magnet used in physics labs?
A.Bar
B.Spherical
C.Star-shaped
D.Triangular
- 2.
What happens if you bring a magnet near a pile of brass screws?
A.All screws are attracted
B.Only half the screws are attracted
C.The screws are repelled
D.The screws are not attracted
- 3.
What is the effect of placing a magnet near a credit card with a magnetic strip?
A.It cleans the card
B.It may damage the data on the strip
C.It recharges the card
D.It makes the card thicker
- 4.
Which of the following is NOT a magnetic material?
A.Iron
B.Steel
C.Cobalt
D.Rubber
- 5.
Which of the following objects would be most useful for a traveler lost in a thick forest to find the way?
A.A thermometer
B.A barometer
C.A magnetic compass
D.A microscope
- 6.
Study the diagram of the magnetic behavior. If object X is attracted to both the North and South poles of a magnet, what is object X?
A.A magnet
B.A magnetic material like iron
C.A non-magnetic material
D.A piece of wood
- 7.
When storing bar magnets, what material is typically placed between the two magnets?
A.A sheet of iron
B.A piece of wood or plastic
C.A copper plate
D.A silver foil
- 8.
If you suspend a bar magnet by a thread, why does it always point in the North-South direction?
A.Because of the wind direction.
B.Because it is seeking the Earth's magnetic poles.
C.Because of the sun's position.
D.Because of the weight of the magnet's poles.
- 9.
When Magnes the shepherd found his staff stuck to a rock, the force he felt was:
A.Gravitational force
B.Electrostatic force
C.Magnetic force
D.Frictional force
- 10.
A magnet is most likely to attract which of the following objects found in a typical classroom?
A.A stainless steel ruler (depending on the grade).
B.A brass key.
C.A steel paper clip.
D.A copper wire.
Download the worksheet for Electricity: Magnetic and Heating Effects - Magnets: Discovery, Poles, and Attraction/Repulsion to practice offline. It includes additional chapter-level practice questions.