Science Practice Quiz 211

Q1.How can electric components and an electric circuit be conveniently represented?

A. Through a flow chart. B. By a circuit diagram. C. With a written description. D. Using a physical model.

Q2.What is the term for the phenomenon where a wire gets heated when an electric current flows through it?

A. Magnetic effect of current. B. Chemical effect of current. C. Heating effect of current. D. Luminous effect of current.

Q3.What is the primary function of electric fuses in electrical circuits?

A. To increase the flow of electric current. B. To convert electrical energy into light. C. To prevent fires and damage to electric appliances. D. To store electrical charge.

Q4.What phenomenon is observed when an electric current flows through a wire?

A. The wire starts glowing brightly. B. The wire behaves like a magnet. C. The wire becomes an insulator. D. The wire expands significantly in length.

Q5.Which of the following best describes an electromagnet?

A. A device that generates static electricity. B. A permanent magnet used in compasses. C. A current carrying coil of an insulated wire wrapped around a piece of iron. D. A material that completely blocks magnetic fields.

Q6.What characteristic property do materials used for making electric fuses possess?

A. They are excellent conductors of heat. B. They melt quickly and break when large electric currents are passed through them. C. They are highly resistant to melting. D. They generate their own magnetic field.

Q7.In the symbol for an electric cell, what does the longer line represent?

A. The negative terminal B. The positive terminal C. The neutral terminal D. The ground terminal

Q8.What is the combination of two or more electric cells called?

A. A circuit B. A resistor C. A battery D. A conductor

Q9.Which safety device is based on the heating effect of electric current?

A. A circuit breaker B. A switch C. A fuse D. A resistor

Q10.What happens when the electric current through a fuse exceeds a certain limit?

A. The fuse wire expands B. The fuse wire melts and breaks C. The fuse wire becomes a superconductor D. The fuse wire generates light

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Science Practice Quiz 211