Physics Quiz: Optics, Heat, Electricity, and Magnetism

What is the unit of power of a lens?

• Watt

• Volt

• Joule

• Diopter

What is the SI unit of specific heat?

• Joule

• Calorie

• Watt

• Diopter

What is the instrument used to measure the potential difference in a circuit?

• Galvanometer

• Voltmeter

• Microphone

• Ammeter

What is the property of a substance due to which it attracts iron powder towards itself?

• Conductivity

• Resistance

• Magnetism

• Diffraction

What is the device that converts high AC voltage to low AC voltage?

• Dynamo

• Electric Motor

• Transformer

• Electric Fuse

What is the SI unit of force?

• Newton

• Joule

• Watt

• Pascal

Who established the first relationship between electricity and magnetism?

• Michael Faraday

• Hans Christian Ostrøed

• Maxwell

• Newton

What is the force that opposes the motion of an object called?

• Centripetal force

• Centrifugal force

• Rolling friction force

• Kinetic energy

What is the product of velocity and mass of an object called?

• Work

• Power

• Momentum

• Energy

What is the law that states 'every action has an equal and opposite reaction'?

• Law of Inertia

• Newton's second law of motion

• Newton's third law of motion

• Newton's first law of motion