PHY101 Final Term Past Papers Merged

Q1. Vu-Topper RM (1 marks)

The image produced by a convex mirror of an erect object in front of the mirror is always: Virtual, erect, and larger than the object

Virtual, erect, and smaller than the object

Real, erect, and larger than the object Real, erect, and smaller than the object

Q2. Vu-Topper RM (1 marks)

In some movies, you sometimes see an actor looking in a mirror and you can see his face in the mirror. During the filming of this scene, what does the actor see in the mirror?

His face Your face

The movie camera (Correct)

The director's face

Q3. Vu-Topper RM (1 marks)

A femtometer is: 10-9 m 10-12 m

10-15 m

10-18 m

Q4. Vu-Topper RM (1 marks)

The "strength" of a lens is measured in _________. Meters Diopters

Lense meter (Correct)

Provatans

Q5. Vu-Topper RM (1 marks)

In constructing a thermometer it is NECESSARY to use a substance that:

Undergoes some change when heated or cooled

Q6. Vu-Topper RM (1 marks)

When an object (iron/tungsten) is heated, it emits light. It emits infrared (IR) light when it is heated at a temperature __________.

Below 800 degree C

Between 800 degree C to 1600 degree C Between 1600 degree C to 2500 degree C above 2500 degree C

Q7. Vu-Topper RM (1 marks)

The reason there are two slits, rather than one, in a Young’s experiment is: to create a path length difference to increase the intensity one slit is for frequency, the other for wavelength

one slit is for Electric fields , the other is for Magnetic fields

Q8. Vu-Topper RM (1 marks)

An electron is moving at 0.6c. If we calculate its kinetic energy using (1/2) mv2, we get a result that is: Just right Just half enough Twice the correct value

About 28% too low (Correct)

Q9. Vu-Topper RM (1 marks)

During a slow adiabatic expansion of a gas: The pressure remains constant Energy is added as heat Work is done on the gas

No energy enters or leaves as heat

Q10. Vu-Topper RM (1 marks)

The theoretical upper limit for the frequency of electromagnetic waves is: just slightly greater than that of red light

there is no upper limit

Q11. Vu-Topper RM (1 marks)

One revolution is the same as: 1 rad 57 rad π/2 rad π rad

2π rad

Q12. Vu-Topper RM (1 marks)

For a body to be in equilibrium under the combined action of several forces: All the forces must be applied at the same point all the forces must be applied at the same point all of the forces form pairs of equal and opposite forces

any two of these forces must be balanced by a third force

Q13. Vu-Topper RM (1 marks)

Capacitors C1 and C2 are connected in series. The equivalent capacitance is given by

C1C2/(C1 + C2)

(C1 + C2)/C1C2 1/(C1 + C2) C1/C2

Q14. Vu-Topper RM (1 marks)

If the potential difference across a resistor is doubled:

only the current is doubled

only the current is halved only the resistance is doubled only the resistance is halved