Electric Current & Its Effects Class 7

A combination of Cells is known as _______

• Element

• Fuse

• Battery

• Electromagnet

What is the following object?

• Cell

• Battery

• Can be any of these

• Switch

Who was the scientists who discovered the magnetic effect of electric current?

Name the applications where Heating effect of Electric Current is used

• Light Bulb

• Electric Geyser

• Electric Heater

• None of these

The coil of wire used in Electric Heaters is called as _______

• Element

• Source

• Both of these

The Positive Terminal is connected to the ________ Terminal & Negative Terminal is connected to ________ Terminal in a battery

• Negative, Positive

• Positive, Negative

• Negative, Negative

• None of these

name the device which prevented the flow of higher current to pass through a circuit in the olden days.

What are the effects of electric current?

• Chemical

• Magnetic

• Kinetic

• Heating

Who discovered the Heating Effect of electric current?

• Hans Christian Oersted

• James Prescott Joule

• Blaise Pascal

• Galileo Galilei

Name the device having the shape of a cylinder, which consists of a long wire wound several times around a hollow metallic core.