EASY
7th CBSE
IMPORTANT
Earn 100

Which of these is a correct symbol of a cell?

89.74% studentsanswered this correctly

Important Questions on Electric Current and its Effects

EASY
7th CBSE
IMPORTANT
Science Booster>Chapter 15 - Electric Current and its Effects>Check Point 2>Q 2
The coiled wire of a bulb is called its _____.
EASY
7th CBSE
IMPORTANT
Science Booster>Chapter 15 - Electric Current and its Effects>Check Point 2>Q 3

Materials of low _____ (resistance/conductance) produce a small amount of heat.

EASY
7th CBSE
IMPORTANT
Science Booster>Chapter 15 - Electric Current and its Effects>Check Point 2>Q 5
All the electrical appliances have a built-in safety device called _____.
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?