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IGCSE O Level Physics Practice Test 29

# Introduction to Light Quiz Questions and Answers PDF - 29

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## Introduction to Light Quiz Answers : Test 29

MCQ 141: _______ is a form of energy.

A) Force
B) Acceleration
C) Light
D) Speed

MCQ 142: Specific latent heat of fusion is

A) the amount of heat required to raise the temperature of a 1 kg of a substance by 1 K
B) the amount of heat required to change the phase of a substance from solid to liquid without any change in temperature
C) the amount of heat required to change the phase of a 1 kg of substance from solid to liquid without any change in temperature
D) the amount of heat required to change the phase of a 1 kg of substance from liquid to gas without any change in temperature

MCQ 143: An object is lifted 5 m above the levelled ground, the mass of the object is 20 kg and the gravitational pull is 10 N kg-2, the Ep of the object is

A) 40 J
B) 1000 J
C) 2.5 J
D) 0.4 J

MCQ 144: A piece of carbon of mass 0.40 kg requires thermal energy of 20 J to get heated from a temperature of 5 °C to 9 °C, the specific heat capacity of the carbon would be

A) 1.25 J kg-1 °C-1
B) 12.5 J kg-1 °C-1
C) 125 J kg-1 °C-1
D) 1250 J kg-1 °C-1

MCQ 145: Periodic time of a simple pendulum depends on

A) The mass of the pendulum bob
B) The collective mass of the pendulum bob and thread
C) The length of the pendulum
D) None of the above

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