Fizika 2023

which of the following is NOT a form of energy?

• Light

• Heat

• Friction

• Sound

Answer explanation

Friction is Force not a form of energy.

what is the principle behind lift of aeroplane's lift?

• Theorem of Continuity

• Pascal's Theorem

• Bernoulli's Theorem

• Newtons law of Gravitation

The audible frequency range of human ear is ?

• 2 Hz to 20Hz

• 20 Hz to 200 Hz

• 20 Hz to 20000 Hz

• 200 Hz to 2000 Hz

Blue colour of sky is due to the effect?

• Reflection of sunlight

• Dispersion of sunlight

• Total internal reflection of sunlight

• Refraction of sunlight

• circle

• parabola

• hyperbola

• ellipse

• +ve x direction

• -ve z direction

• +ve z diection

• -ve x direction

Which one of the following phenomena shows particle nature of light?

• Photoelectric Effect

• Interference

• Diffraction

• Refraction

When light passes from one medium to another medium, which one of the following does not change?

• Intensity

• Wavelength

• Velocity

• Frequency

• Force becomes 4 times

• Force remains unchanged

• Force becomes two times

• Force becomes 8 times

• 0

• 1