Physics MCQ Set-02

What is the unit of work in the SI system?

• joule

• pascal

• watt

• newton

Which of the following is a form of energy?

• Thermal energy

• Nuclear energy

• Kinetic energy

• Chemical energy

What is the formula for kinetic energy?

• KE = 2mv

• KE = mv^2

• KE = 1/2 mv^2

• KE = 1/2 m^2v

What is the principle of conservation of energy?

• Energy can be created from nothing.

• Energy is always lost in transformations.

• Energy can be destroyed but not created.

• Energy cannot be created or destroyed, only transformed.

What type of wave is a sound wave?

• Surface wave

• Longitudinal wave

• Electromagnetic wave

• Transverse wave

What is the speed of sound in air at room temperature?

• 250 meters per second

• 400 meters per second

• 343 meters per second

• 300 meters per second

What is the relationship between frequency and wavelength?

• Frequency and wavelength are directly related.

• Wavelength increases with increasing frequency.

• Frequency has no effect on wavelength.

• Frequency and wavelength are inversely related.

What is the formula for power in terms of work and time?

• Power = Work / Time

• Power = Work + Time

• Power = Work - Time

• Power = Time / Work

What is the difference between potential energy and kinetic energy?

• Potential energy is stored energy based on position; kinetic energy is energy of motion.

• Potential energy is related to temperature; kinetic energy is related to pressure.

• Potential energy is always greater than kinetic energy; kinetic energy can never be negative.

• Potential energy is the energy of motion; kinetic energy is stored energy based on position.

What is the Doppler effect?

• The Doppler effect is the increase in amplitude of a wave due to the motion of the observer.

• The Doppler effect refers to the change in color of light due to the speed of the source.

• The Doppler effect is the phenomenon where sound waves become louder as they approach the observer.

• The Doppler effect is the change in frequency or wavelength of a wave due to the relative motion of the source and the observer.