Define resistivity and state its S.I. unit. Does it vary with temperature?

Important Questions on Electricity

EASY

10th CBSE

IMPORTANT

ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-3>Q 32

Chemical cells or dynamos do not produce electrons. How do they produce current electricity?

MEDIUM

10th CBSE

IMPORTANT

ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-3>Q 33

Name two devices which can produce continuous current. Which form of energy is responsible for the generation of electric current in the devices named by you?

EASY

10th CBSE

IMPORTANT

ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-3>Q 34

How are ammeters and voltmeters connected in a circuit? What do they help us measure?

EASY

10th CBSE

IMPORTANT

ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-3>Q 35

A wire is cut into two equal parts and then connected in parallel. How will its resistance get affected?

EASY

10th CBSE

IMPORTANT

ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-3>Q 35

A wire is cut into two equal parts and then connected in parallel. How will its resistivity get affected?

EASY

10th CBSE

IMPORTANT

ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-3>Q 36

Two students perform experiments on two given resistors $R_{1}$ and $R_{2}$ and plot the following $V$ - $I$ graphs. If $R_{1} > R_{2},$ which of two diagrams correctly represent the situation on the plotted curves? Justify your answer.