The picture shows steel clips being attracted to an iron nail in an electric circuit. Which effect of electric current attracts the steel clips to the iron nail?

When an electric potential different is applied in the form of using a battery in a circuit, an electric current flows through the circuit. Electric current is the amount of charge that passes through the wires of a circuit per unit time. Due to the passage of the electric current through the wires, a magnetic field is produced in their near vicinity. This magnetic field can attract any magnetic material like a steel. Hence, the steel clops are attracted to the iron nail because of the magnetic effect of current.

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 7

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Which of these labels on an electric device confirms standard quality?

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Important Questions on Electric Current and Its Effects

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 8

Which of these consumes the least electricity for producing the same amount of light?

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 9

The picture shows steel clips being attracted to an iron nail in an electric circuit.

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Which effect of electric current attracts the steel clips to the iron nail?

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 10

In which of these devices is an electromagnet used?

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 11

The diagram shows a flashlight battery and a bulb connected by wires to various substances. Which of the bulbs will light?

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 12

See the circuit shown below in figure P. If the battery is connected the other way (as shown in figure Q), what will happen?

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Science Textbook of Competency Based Questions for Class VII>Chapter 14 - Electric Current and Its Effects>Exercise>Q 13

Many electrical devices like televisions and electric irons have plugs which have 3 pins. However, other devices sometimes work with only 2 pins. Why is the third pin necessary?

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