Electricity: Magnetic and Heating Effects
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Electric Circuit Components and Symbols
SubtopicElectric Circuit Components and Symbols under Electricity: Magnetic and Heating Effects for Grade 7 CBSE.
Preview questions (no answers)
- 1.
What will happen if you connect the positive terminal of one cell to the positive terminal of another in a battery?
A.The bulb will glow brighter
B.The bulb will not glow
C.The cells will last longer
D.The wires will melt
- 2.
Electric wires are often made of copper because copper is a:
A.Good conductor of electricity
B.Good insulator of electricity
C.Magnetic material
D.Liquid at room temperature
- 3.
Which part of an electric bell produces the 'ring' sound?
A.The coil
B.The gong
C.The battery
D.The switch
Download the worksheet for Electricity: Magnetic and Heating Effects - Electric Circuit Components and Symbols to practice offline. It includes additional chapter-level practice questions.
Heating Effect of Electric Current and Fuses
SubtopicHeating Effect of Electric Current and Fuses under Electricity: Magnetic and Heating Effects for Grade 7 CBSE.
Preview questions (no answers)
- 1.
An MCB trips when:
A.The current is safe
B.The current exceeds the safe limit
C.The battery is fully charged
D.The light is turned on
- 2.
What ensures that an appliance is manufactured according to safety standards in India?
A.The color of the wire
B.The ISI mark
C.The size of the plug
D.The weight of the device
- 3.
Which appliance works on the same principle as the electric iron?
A.Electric bell
B.Electric heater
C.Electric motor
D.Television
Download the worksheet for Electricity: Magnetic and Heating Effects - Heating Effect of Electric Current and Fuses to practice offline. It includes additional chapter-level practice questions.
Magnetic Effect of Electric Current
SubtopicMagnetic Effect of Electric Current under Electricity: Magnetic and Heating Effects for Grade 7 CBSE.
Preview questions (no answers)
- 1.
When making an electromagnet, the wire must be wound in the form of a:
A.Square
B.Coil
C.Straight line
D.Zig-zag
- 2.
In an electric bell, the circuit is broken at the:
A.Switch
B.Battery
C.Contact screw and iron strip
D.Electromagnet coil
- 3.
The magnetic effect of electric current is used in which of the following?
A.Electric heater
B.Electric toaster
C.Electric fan motor
D.Electric iron
Download the worksheet for Electricity: Magnetic and Heating Effects - Magnetic Effect of Electric Current to practice offline. It includes additional chapter-level practice questions.
Electromagnets and Electric Bell
SubtopicElectromagnets and Electric Bell under Electricity: Magnetic and Heating Effects for Grade 7 CBSE.
Preview questions (no answers)
- 1.
If you increase the number of cells in a circuit containing an electromagnet, the magnetic strength will:
A.Decrease
B.Increase
C.Stay the same
D.Become zero
- 2.
The deflection of a compass needle by a current-carrying wire proves that the wire is acting like a:
A.Battery
B.Magnet
C.Resistor
D.Fuse
- 3.
Which of these is the most important component for making an electromagnet?
A.A glass rod
B.A coil of insulated wire
C.A plastic switch
D.A wooden base
Download the worksheet for Electricity: Magnetic and Heating Effects - Electromagnets and Electric Bell to practice offline. It includes additional chapter-level practice questions.