Which of these is a correct symbol of a cell?

Important Questions on Electric Current and its Effects

MEDIUM

7th CBSE

IMPORTANT

Science Booster>Chapter 15 - Electric Current and its Effects>PRACTICE TIME>Q E

In which of the following circuits, the bulb is going to glow?

MEDIUM

7th CBSE

IMPORTANT

Science Booster>Chapter 15 - Electric Current and its Effects>PRACTICE TIME>Q E

Draw a circuit diagram showing a glowing bulb with a battery of two cells.

MEDIUM

7th CBSE

IMPORTANT

Science Booster>Chapter 15 - Electric Current and its Effects>PRACTICE TIME>Q E

Draw the circuit diagrams for open and closed circuits.

EASY

7th CBSE

IMPORTANT

Science Booster>Chapter 15 - Electric Current and its Effects>PRACTICE TIME>Q F

Why are fluorescent tubes and CFLs better alternatives to an electric bulb?

MEDIUM

7th CBSE

IMPORTANT

Science Booster>Chapter 15 - Electric Current and its Effects>PRACTICE TIME>Q F

Why is fuse wire made of tin or alloy of tin and copper?

MEDIUM

7th CBSE

IMPORTANT

Science Booster>Chapter 15 - Electric Current and its Effects>PRACTICE TIME>Q F

List the appliances used in which you are using the heating effect of electric current. Can you think of the appliances in which heat produced due to flow of current is a waste?