3
Q:

# In very cold countries alcohol is used as a thermometric liquid because

 A) alcohol is a poor conductor of heat B) alcohol can be coloured for its level to be seen easily C) its freezing point is very low D) it will not stick to the glass tube

Answer:   C) its freezing point is very low

Explanation:

Alcohol has a freezing point as low as  $\inline -117^{o}C$. So it won't freeze even in very cold countries.

Subject: Physics
Q:

The capacity of a pure capacitor is 1 farad. In D.C circuit, its effective resistance will be

 A) Zero B) Infinite C) 1 Ohm D) 1/2 Ohm

Explanation:

Filed Under: Physics

0 19
Q:

A convex mirror is used to form an image of a real object. The image

 A) is diminished in size B) is erect C) always lies between the pole and the focus D) all of the above

Explanation:

Filed Under: Physics

0 29
Q:

The quality of sound produced by an instrument depends on the

 A) Frequency B) Intensity C) Number of overtones D) None of these

Explanation:

Filed Under: Physics

0 28
Q:

In the electrical circuit of a house, the fuse acts as

 A) a load B) a thermopile C) a safety device D) a step down device

Explanation:

Filed Under: Physics

0 19
Q:

The direction of heat flow between two objects depends on

 A) Their masses B) Their heat contents C) Their temperatures D) Whether they are in solid, liquid or gaseous state