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A convex lens is used in which of the following devices?

A. Magnifying glass
B. Concave mirror
C. Biconcave lens
D. Diffraction grating

Answer: Magnifying glass

Subjects: Optics, Physics

When a wave passes from one medium to another and bends, this phenomenon is known as:

A. Refraction
B. Reflection
C. Diffraction
D. Interference

Answer: Refraction

The principle stating that the temperature of a gas is directly proportional to its volume at constant pressure is known as:

A. Charles' law
B. Boyle's law
C. Dalton's law
D. Avogadro's law

Answer: Charles' law

What is the heat required to raise the temperature of 1 gram of water by 1°C called?

A. Calorie
B. Joule
C. Watt
D. Kelvin

Answer: Calorie

The property that measures how much a material changes its shape under applied forces is called:

A. Strain
B. Stress
C. Elastic modulus
D. Shear modulus

Answer: Strain

The gravitational potential energy of an object at height h above the Earth’s surface is given by:

A. mgh
B. Gm₁m₂ / r
C. 1/2 mv²
D. Fh

Answer: mgh

Subjects: Gravitation, Physics

If two objects of different masses collide elastically, which of the following is true about their velocities after the collision?

A. The relative velocity remains the same
B. The relative velocity changes
C. The velocity of each object is the same
D. The velocity of the more massive object increases

Answer: The relative velocity remains the same

The energy possessed by an object due to its motion is called:

A. Kinetic energy
B. Potential energy
C. Elastic energy
D. Thermal energy

Answer: Kinetic energy

Impulse is defined as:

A. Change in momentum
B. Force multiplied by distance
C. Work done
D. Change in velocity

Answer: Change in momentum

Subjects: Dynamics, Physics