11th Physics Important 5 Mark Questions. We covered all the 11th Physics Important 5 Mark Questions in this post for free so that you can practice well for the exam.
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11th Physics Important 5 Mark Objective Questions for Students
On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because
(a) metals have higher thermal capacity than plastics.
(b) plastics have a lower density than metals.
(c) metals are good conductors of heat.
(d) plastics have a higher thermal conductivity than metals.
Option d – plastics have a higher thermal conductivity than metals
A glass vessel is filled with water up to the brim and a lid is fixed to it tightly. Then it is kept inside a freezer for hours. What is expected to happen?
(a) The water freezes to ice, and the level of ice comes down.
(b) The water in the glass vessel summer freezes to ice.
(c) The glass vessel breaks due to expansion as water freezes to ice.
(d) The water does not freeze at all.
Option c – The glass vessel breaks due to expansion as water freezes to ice
When water freezes, its density
(a) decreases
(b) becomes zero
(c) remains constant
(d) increases
Option c – remains constant
The absolute zero is a temperature at which
(a) molecular motion in a gas would cease
(b) water freezes
(c) all gases become liquid
(d) all gases become solid
Option d – all gases become solid
The surface water of a lake is about to freeze. What will be the temperature (in °C) of water at the bottom of the lake?
(a) 0
(b) -1
(c) 1
(d) 4
Option d – 4
Why is it difficult to measure the coefficient of expansion of a liquid than a solid?
(a) Liquids tend to evaporate at all temperatures.
(b) Liquids conduct more heat.
(c) Liquids expand too much when heated.
(d) Their containers also expand when heated.
Option d – Their containers also expand when heated
A metal plate with a circular hole at the center is heated. What will happen to the area of the hole?
(a) Increase
(b) Decrease
(c) Remain constant
(d) Will increase first and then decrease.
Option a – Increase
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