Physics

A

The total momentum of a closed system is constant.

B

The total energy of a closed system is constant.

C

The acceleration of an object is constant.

D

The velocity of an object remains constant.

Explanation Comments

A

A force acting at an angle of 45 degrees to the direction of displacement

B

A force acting opposite to the direction of displacement

C

A force acting in the same direction as the displacement

D

A force acting perpendicular to the direction of displacement

Explanation Comments

A

Zeroth law of thermodynamics

B

First law of thermodynamics

C

Second law of thermodynamics

D

Third law of thermodynamics

Explanation Comments

A

Mechanical energy

B

Thermal energy

C

Potential energy

D

Chemical energy

Explanation Comments

A

Ohm (Ω)

B

Ampere (A)

C

Coulomb (C)

D

Volt (V)

Explanation Comments

A

The total resistance is independent of the individual resistances.

B

The total resistance is always smaller than the smallest individual resistance.

C

The total resistance is always larger than the largest individual resistance.

D

The total resistance is equal to the sum of the individual resistances.

Explanation Comments

A

When light passes from a medium with the same refractive index to another medium.

B

When light passes from a medium with lower refractive index to a medium with higher refractive index.

C

When light passes from one medium to another at any angle.

D

When light passes from a medium with higher refractive index to a medium with lower refractive index.

Explanation Comments

A

Concave mirror

B

Spherical mirror

C

Plane mirror

D

Convex mirror

Explanation Comments

A

Momentum

B

Inertia

C

Friction

D

Acceleration

Explanation Comments

A

Its acceleration is zero.

B

Its velocity is constant.

C

It is not subject to air resistance.

D

Its weight is zero.

Explanation Comments

What does the principle of conservation of momentum state?

Explanation:

In which of the following cases is the work done by a force positive?

Explanation:

Which law of thermodynamics states that no heat engine can be more efficient than a Carnot engine operating between the same two reservoirs?

Explanation:

What is the term for the energy associated with the motion of particles in a substance?

Explanation:

What is the SI unit of electric charge?

Explanation:

In a series electrical circuit, how does the total resistance compare to the individual resistances?

Explanation:

When does total internal reflection occur in optics?

Explanation:

What type of mirror forms a virtual, upright, and diminished image?

Explanation:

What is the term for the resistance of an object to a change in its state of motion?

Explanation:

Which of the following is true about an object in free fall near the surface of the Earth?

Explanation:

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