Physics GK Quiz

Q106. The wave of theory of light is based on
(a) the laws of reflection
(b) the laws of refraction
(c) the inverse square law
(d) Huyghens' principle

Q107. The unit of magnetic permeability is
(a) Henry/meter
(b) Henry
(c) Weber
(d) Weber/meter

Q108. The domain theory of magnetism applies to
(a) aluminium
(b) copper
(c) silver
(d) cobalt

Q109. The paramagnetic theory of magnetism applies to
(a) nickel
(b) mercury
(c) iron
(d) platinum

Q110. Due to temperature variation along a conductor, potential variation occurs along it. This phenomenon is known as
(a) Thomson effect
(b) Joule effect
(c) Seebeck effect
(d) Peltier effect

Q111. What is the law in which under the same conditions of temperature and pressure, equal volumes of all gas contain equal number of molecules
(a) Colioli effect
(b) Grahams law
(c) Pascal's law
(d) Avogadro's law

Q112. The impulse of a torque about an axis is equal to
(a) angular velocity about that axis
(b) angular momentum about that axis
(c) the force applied on it
(d) the workdone

Q113. Impulse is the product of _________ and ________
(a) mass, velocity
(b) mass, acceleration
(c) force, time
(d) torque, time

Q114. The perfectly elastic bodies have Co-efficient of restitution
(a) 0
(b) 1
(c) -1
(d) Infinity

Q115. How soap water remove the dust and strain from the cloth
(a) It increase the surface tension of the water
(b) It decrease the surface tension of the water
(c) It produce heat on the cloth
(d) No change in surface tension

Q116. Which of the following physièal quantity does not have the unit of N/m²
(a) pressure
(b) stress
(c) viscosity
(d) modulus of elasticity

Q117. The Stefan's law reduces to Newton's law of cooling when
(a) the temperature difference between body and surrounding is large
(b) the temperature difference is small
(c) conduction is negligible compared to radiation
(d) at all temperature differences

Q118. When the displacement of a simple harmonic oscillator is zero, its speed is
(a) zero
(b) maximum
(c) infinity
(d) minimum

Q119. Velocity of sound in a solid is proportional to
(a) adiabatic elasticity of the medium
(b) isothermal elasticity of the medium
(c) square root of isothermal elasticity of medium
(d) square root of adiabatic elasticity of medium

Q120. At constant temperature, as pressure increases, the velocity of sound in gas
(a) increases
(b) decreases
(c) remains the same
(d) becomes zero

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