Electricity and magnetism Quiz - ICSE Class 7 Science
Free practice quiz: Electricity and magnetism (ICSE Class 7 Science). 51 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
This ICSE Class 7 Science practice quiz has 51 multiple-choice questions on Electricity and magnetism, and 51 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.
Start quiz: 51 questions, freeSample questions
Which of the following materials is the best conductor of electricity?
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Answer: C. Copper
Conductors are materials that allow electric current to flow easily. Copper is a metal known for its excellent conductivity due to the free movement of electrons in its atomic structure. Rubber, wood, and plastic are insulators, meaning they resist the flow of electricity.
Which of the following will NOT create a magnetic field?
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Answer: D. A stationary electric charge
Moving electric charges (electric current) and permanent magnets produce magnetic fields. A piece of iron placed near a magnet becomes magnetized and thus has a magnetic field. However, a stationary electric charge only produces an electric field, not a magnetic field.
In a circuit, adding more resistors in series will:
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Answer: A. Increase the total resistance
When resistors are connected in series, their resistances add up. Therefore, adding more resistors in series increases the total resistance of the circuit.
The opposition to the flow of electric charge is called:
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Answer: D. Resistance
Resistance is a property of a material that opposes the flow of electric current. It is measured in Ohms (Ω).
If you bring the North pole of one bar magnet near the South pole of another bar magnet, what will happen?
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Answer: B. They will attract each other
Unlike magnetic poles (North and South) attract each other. Like poles (North-North or South-South) repel each other.
More questions in this quiz
Answers and explanations are in the full quiz.
- A circuit breaker is a safety device that:
- What is the unit of electric current?
- In a series circuit, if one bulb burns out, what happens to the other bulbs?
- Which of the following is a magnetic material?
- The force that opposes the motion of an object through a fluid (like air or water) is called:
- What happens to the magnetic field lines of a bar magnet inside the magnet?
- Which device converts electrical energy into mechanical energy?
- If you rub a balloon on your hair and it sticks to the wall, this is an example of:
- What is the primary function of an insulator in an electrical circuit?
- In a parallel circuit, if one bulb burns out, what happens to the other bulbs?
- The strength of an electromagnet can be increased by:
- What is the potential difference across a resistor if a current of 2 Amperes flows through it and its resistance is 5 Ohms?
- Which material is commonly used as the core of an electromagnet because it is easily magnetized and demagnetized?
- What is the unit of electrical resistance?
- When a conductor is heated, its resistance generally:
- Which of the following is an example of a non-magnetic material?
- The device used to measure electric current is called a(n):
- Which phenomenon explains why a charged balloon can pick up small pieces of paper?
- The force exerted by a magnet is strongest at its:
- What is the unit of electric power?
- Which of the following is the best insulator?
- When a magnet is broken into two pieces, how many poles does each piece have?
- The flow of electric charge is called:
- If the voltage across a circuit doubles, and the resistance remains the same, the current will:
- Which of the following is NOT a source of magnetism?
- In a parallel circuit, the total resistance is always:
- What happens to a compass needle when it is brought near a bar magnet?
- Which of the following is an example of induced magnetism?
- In a simple electric circuit, a switch is used to:
- What is the electrical potential difference between two points in an electric circuit called?
- Which of the following substances is paramagnetic, meaning it is weakly attracted by a magnet?
- If a circuit has very low resistance, what can happen if a high voltage is applied?
- What is the term for a material that allows electric current to pass through it easily?
- Which of the following will increase the magnetic strength of an electromagnet made with a coil and a core?
- What is the primary effect of electric current in a wire, besides causing a magnetic field?
- A material that does not conduct electricity is called a(n):
- What is the unit of electric potential difference?
- Which of the following metals is NOT ferromagnetic and therefore not strongly attracted to magnets?
- What happens to the resistance of a conductor if its length is increased, assuming all other factors remain constant?
- The SI unit for magnetic flux density (or magnetic field strength) is the:
- What device converts electrical energy into light energy?
- In a series circuit with identical bulbs, if one bulb is removed, what happens to the others?
- Which of the following is NOT a property of magnets?
- What is the term for the potential energy stored in an electric field?
- What effect does passing an electric current through a coil of wire wound around an iron core produce?
- Which of the following will happen if you increase the resistance of a circuit while keeping the voltage constant?
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