Work & Energy MCQs with Answers

What is the primary purpose of a turbocharger or drive?

• A.To reduce the engine's operating temperature
• B.To increase fuel consumption in the engine
• C.To compress air for better engine efficiency
• D.To filter exhaust gases before emission

Past Paper MCQ

What is the energy formed due to waterfall?

• A.Kinetic energy
• B.Potential energy
• C.Both A and B
• D.None of these

A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?

• A.6 J
• B.9 J
• C.18 J
• D.12 J

A photon of energy 4.1 MeV is incident on a lead nucleus, causing the creation of an electron-positron pair. They travel perpendicular to the initial direction of the photon. The energy of the electron is:

• A.1.02 MeV
• B.4.10 MeV
• C.2.05 MeV
• D.0.51 MeV

The dimensions of Planck's constant are similar to which of the following?

• A.Energy
• B.Angular momentum
• C.Power
• D.Linear momentum

If frequency of incident radiation in photoelectric effect is increased beyond threshold frequency, it will not affect?

• A.Kinetic energy of emitted electrons
• B.Photoelectric current
• C.Stopping potential
• D.Energy of emitted electrons

Each mole of glucose produces maximum energy i.e ?

• A.2827 Kj
• B.2527 Kj
• C.3027 Kj
• D.2427 Kj

What is biomass primarily derived from?

• A.Fossilized remains of ancient organisms
• B.Inorganic minerals extracted from the earth's crust
• C.Synthetic organic compounds manufactured in laboratories
• D.Living or recently living plant and animal materials

Atom bomb is based on the principle of:

• A.Nuclear Fusion
• B.Nuclear Fission
• C.Chemical Combustion
• D.Radioactive Decay

When a bullet is fired upwards vertically it gains in:

• A.Kinetic energy
• B.Heat energy
• C.Potential energy
• D.Chemical energy