Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.
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Question 561: The symbol −10X used to represent which of the particles?
Options:
A) Proton
B) Neutron
C) Electrons
D) Atoms
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The correct answer is C .
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Question 562: A shooter wants to fire a bullet in such a way that its horizontal range is equal to three times its maximum height. At the what angle should he fire the bullet to achieve this?
Options:
A) 68o
B) 53o
C) 30o
D) 45o
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The correct answer is B .
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Question 563:
Heat may be transferred by conduction, convention and radiation. By which of these methods does heat travel through vacuum?
Options:
A) Conduction only
B) Convection only
C) Radiation only
D) All these methods
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The correct answer is C .
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Question 564: The main purpose of the transformer in an a.c radio set is to?
Options:
A) increase power to the radio
B) step up the voltage
C) convert energy from a.c to d.c
D) step down the voltage
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The correct answer is D .
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Question 565:
The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the
Options:
A) angle of variation is zero
B) magnetic declination is 90
C) angle of dip is zero
D) horizontal component at the Earth's field is zero
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The correct answer is C .
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Question 566: A moving coil galvanometer of 300 resistance gives full scale deflection for 1.0mA. The resistance R, of the shunt that is required to convert the galvanometer into a 3.0A ammeter is
Options:
A) 899.70
B) 10.00
C) 0.10
D) 0.01
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The correct answer is C .
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Question 567:
Which of the following equations is the correct definition of the reactance of an indicator L?
Options:
A) Reactance = (Amplitude of voltage) (Amplitude of current)
B) Reactance = (Amplitude of voltage) x (Amplitude of current)
C) Reactance = (Amplitude of current) (Amplitude of voltage)
D) Reactance = (Amplitude of current) (Amplitude of voltage)
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The correct answer is A .
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Question 568: The ground is always cold at night because the
Options:
A) atmosphere absorbs the sun's energy at night
B) earth radiates heat to the atmosphere at night
C) sun no longer shine at night
D) atmosphere reflects the sun's energy at night
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The correct answer is B .
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Question 569: When the human eye loses its power of accomodation, the defect is known as
Options:
A) short sightedness
B) presbyobia
C) astigmatism
D) long sightedness
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The correct answer is B .
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Question 570: A cell of internal resistance 2 ohms supplies current to a 6 ohms resistor. The efficiency of the cell is
Options:
A) 12.0%
B) 25.0%
C) 33.3%
D) 75.0%
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The correct answer is D .