11th Physics Guide Tamil Medium. We covered all the 11th Physics Guide Tamil Medium MCQs in this post for free so that you can practice well for the exam.
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11th Physics Guide Tamil Medium Objective for Students
Certain substances lose their electrical resistance completely at super-low temperatures. Such substances are called:
(a) superconductors
(b) semiconductors
(c) dielectrics
(d) perfect conductors
Option a - superconductors
A second pendulum is a pendulum whose time period is:
(a) 1 second
(b) 4 seconds
(c) 3 seconds
(d) 2 seconds
Option d - 2 seconds
A jug is filled to the brim with water at 0°C. A piece of ice floats in it. The moment the ice melts:
(a) water spills out of the jug
(b) water level increases
(c) water level decreases
(d) water level is unchanged
Option d - water level is unchanged
Which of the following devices can be used to detect radiant heat?
(a) Liquid thermometer
(b) Six's maximum and minimum thermometer
(c) Constant volume air thermometer
(d) Thermopile
Option d - Thermopile
The threshold frequency is the frequency below which:
(a) photocurrent increases with voltage
(b) photocurrent decreases with voltage
(c) photoelectric emission is not possible
(d) photocurrent is constant
Option c - photoelectric emission is not possible
Sir C.V. Raman was awarded the Nobel Prize for his work in:
(a) Light scattering
(b) Radioactivity
(c) Cryogenics
(d) Sonometer
Option a - Light scattering
A metal screw-top on a glass bottle that appears to be stuck could be opened using the fact that:
(a) the metal expands more than the glass when both are heated
(b) the metal and glass expand identically when heated
(c) the metal shrinks when heated
(d) both metal and glass shrink when cooled
Option a - the metal expands more than the glass when both are heated
Fleming's right-hand rule is used to find the direction of the:
(b) Direct Current
(c) Induced Current
(d) Actual Current
Option c - Induced Current
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