General Science Set-1: Physics
General Science Set-1: Physics
Question 1
Which of the following is the SI unit of force?
(1) Newton
(2) Pascal
(3) Joule
(4) Watt
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Answer: (1)
Solution: The SI unit of force is Newton, which is defined as the force required to accelerate a mass of one kilogram at a rate of one meter per second squared.
Question 2
What is the SI unit of electric current?
(1) Volt
(2) Ampere
(3) Ohm
(4) Coulomb
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Answer: (2)
Solution: The SI unit of electric current is Ampere, which is the flow of one Coulomb of charge per second.
Question 3
Which of the following is a vector quantity?
(1) Speed
(2) Distance
(3) Displacement
(4) Time
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Answer: (3)
Solution: Displacement is a vector quantity because it has both magnitude and direction, whereas speed, distance, and time are scalar quantities.
Question 4
Which of the following is not a type of mechanical wave?
(1) Sound wave
(2) Water wave
(3) Light wave
(4) Seismic wave
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Answer: (3)
Solution: Light wave is an electromagnetic wave, not a mechanical wave. Mechanical waves require a medium to travel through, while electromagnetic waves can travel through a vacuum.
Question 5
What is the SI unit of power?
(1) Watt
(2) Joule
(3) Newton
(4) Coulomb
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Answer: (1)
Solution: The SI unit of power is Watt, which is defined as one joule of energy per second.
Question 6
Which of the following is a renewable source of energy?
(1) Coal
(2) Natural gas
(3) Solar energy
(4) Nuclear energy
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Answer: (3)
Solution: Solar energy is a renewable source of energy, whereas coal, natural gas, and nuclear energy are non-renewable.
Question 7
What is the function of a transformer in an electrical circuit?
(1) To convert AC to DC
(2) To change the voltage level
(3) To increase the current
(4) To decrease the resistance
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Answer: (2)
Solution: A transformer is used to change the voltage level in an electrical circuit, either stepping up or stepping down the voltage.
Question 8
Which of the following is a property of a magnetic field?
(1) It is a scalar quantity
(2) It exerts force on a moving charge
(3) It is uniform in all directions
(4) It is always radial in nature
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Answer: (2)
Solution: A magnetic field exerts a force on a moving charge, as described by the Lorentz force law.
Question 9
Which of the following is the correct formula for the force between two point charges?
(1) $ F = \frac{kq_1q_2}{r^2} $
(2) $ F = \frac{kq_1 + q_2}{r} $
(3) $ F = kq_1q_2r $
(4) $ F = \frac{kq_1q_2}{r} $
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Answer: (1)
Solution: The correct formula for the electrostatic force between two point charges is given by Coulomb’s Law: $ F = \frac{kq_1q_2}{r^2} $.
Question 10
What is the SI unit of electric resistance?
(1) Ohm
(2) Volt
(3) Ampere
(4) Coulomb
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Answer: (1)
Solution: The SI unit of electric resistance is Ohm, which is defined as the resistance that allows one ampere of current to flow when one volt is applied.
Question 11
Which of the following is an example of a non-contact force?
(1) Friction
(2) Tension
(3) Gravitational force
(4) Normal force
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Answer: (3)
Solution: Gravitational force is a non-contact force, meaning it can act without physical contact between objects.
Question 12
What is the term used for the change in velocity over time?
(1) Acceleration
(2) Speed
(3) Distance
(4) Displacement
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Answer: (1)
Solution: Acceleration is the rate of change of velocity with respect to time.
Question 13
Which of the following is a type of electromagnetic wave?
(1) Sound wave
(2) Water wave
(3) Light wave
(4) Seismic wave
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Answer: (3)
Solution: Light wave is an electromagnetic wave, while sound, water, and seismic waves are mechanical waves.
Question 14
What is the SI unit of energy?
(1) Watt
(2) Volt
(3) Joule
(4) Coulomb
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Answer: (3)
Solution: The SI unit of energy is Joule, which is defined as the work done when a force of one Newton moves an object one meter.
Question 15
What is the function of a diode in an electronic circuit?
(1) To store electric charge
(2) To allow current to flow in one direction only
(3) To increase the resistance
(4) To convert AC to DC
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Answer: (2)
Solution: A diode allows current to flow in one direction only, acting as a one-way valve for electric current.
Question 16
Which of the following is a scalar quantity?
(1) Velocity
(2) Displacement
(3) Speed
(4) Acceleration
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Answer: (3)
Solution: Speed is a scalar quantity, as it has magnitude but no direction. Velocity, displacement, and acceleration are vector quantities.
Question 17
Which of the following is the correct formula for kinetic energy?
(1) $ KE = \frac{1}{2}mv $
(2) $ KE = \frac{1}{2}mv^2 $
(3) $ KE = mv^2 $
(4) $ KE = \frac{1}{2}m $
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Answer: (2)
Solution: The correct formula for kinetic energy is $ KE = \frac{1}{2}mv^2 $, where $ m $ is mass and $ v $ is velocity.
Question 18
What is the SI unit of electric charge?
(1) Coulomb
(2) Ampere
(3) Volt
(4) Ohm
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Answer: (1)
Solution: The SI unit of electric charge is Coulomb, which is defined as the charge transported by one ampere in one second.
Question 19
Which of the following is a type of renewable energy?
(1) Coal
(2) Natural gas
(3) Wind energy
(4) Nuclear energy
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Answer: (3)
Solution: Wind energy is a renewable source of energy, while coal, natural gas, and nuclear energy are non-renewable.
Question 20
What is the term for the resistance offered by a conductor to the flow of electric current?
(1) Voltage
(2) Current
(3) Resistance
(4) Power
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Answer: (3)
Solution: Resistance is the property of a conductor that opposes the flow of electric current.
Question 21
Which of the following is a non-metal?
(1) Iron
(2) Copper
(3) Carbon
(4) Aluminum
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Answer: (3)
Solution: Carbon is a non-metal, while iron, copper, and aluminum are metals.
Question 22
What is the SI unit of magnetic field strength?
(1) Tesla
(2) Weber
(3) Coulomb
(4) Ampere
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Answer: (1)
Solution: The SI unit of magnetic field strength is Tesla, which is defined as one Newton per Ampere-meter.
Question 23
Which of the following is a type of simple machine?
(1) Lever
(2) Wedge
(3) Inclined plane
(4) All of the above
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Answer: (4)
Solution: Lever, wedge, and inclined plane are all types of simple machines.
Question 24
What is the SI unit of frequency?
(1) Hertz
(2) Watt
(3) Coulomb
(4) Ohm
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Answer: (1)
Solution: The SI unit of frequency is Hertz, which is defined as one cycle per second.
Question 25
Which of the following is a property of light waves?
(1) They require a medium to travel
(2) They are mechanical waves
(3) They exhibit both reflection and refraction
(4) They are longitudinal waves
BETA
