10th Class Physics MCQS Chapter 5

The current used in houses is:

Current

Conventiona current

A.C.

D.C

When resistance are connected in series the current passing through them is .

The same

None of these

Zero

Different

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror:

-9.9 cm

8.2 cm

4.1 cm

20 cm

A conductor of electric current is:

Copper

Plastic

Rubber

Wood

The point through which rays of light pass after reflection from concave mirror is called principal:

Focus

Axis

Circle

Radius

Joule’s law is W = ____________________

I²Rt

IRt²

IR²t

IR/t

The rate of flow of charge through any cross sectional area is called:

Energy

potential difference

Coulomb

Electric current

Which combination forms NAND gate:

AND & OR

AND & NOT

NOT & OR

NAND & NOT

The unit of resistance is:

C

?

? m

V

Which gate is used for safety alarm:

NOR

OR

AND

NANAD