Advanced level 2024 CASPA mock physics 1
Advanced level 2024 CASPA mock physics 1
Questions: 1- 35
Directions: Each of the thirty-five questions or incomplete
statements in this section is followed by four suggested answers.
Select the best answer in each case.
1. A step-down transformer with a turn ratio of 5:4 and an
efficiency of 88% is used to run a motor. If the mains
a.c. is 5.0 A, the current drawn by the motor will be:
A. 3.5 B. 8.8 C. 1.8 D. 5.5
2. Intensity defined as power per unit area. Which of the
following is the base units of intensity?
A. Kg m2 s-1 C. Kg s-3
B. Kg m4 s-3 D. Kg2 m2 s
3. An arrow is shot straight up in the air at an initial speed
of 15.0 m/s. After how much time is the arrow moving
downward at a speed of 8.00 m/s?
A. 0.71 s C. 1.24 s
B. 1.87 s D. 2.35
4. In figure 1, a bullet is fired from the top of a tower at an
angle of 60o to the horizontal.
If the bullet takes 12 s to land on the ground at M which is
720 m from the bottom of the tower. The projection speed,
u, of the projectile is:
A. 69 m s-1 C. 110 m s-1
B. 90 m s-1 D. 120 m s-1
5. Which of the following phenomena provides evidence
that light has a wave nature?
A. Emission of light from energy level transitions in
atoms.
B. Diffraction of light passing through a narrow
opening.
C. Absorption of light by a black sheet of paper
D. Photoelectric effect.
6. A lamp is placed 0.50 m from a converging lens. The
power of the lens is 5.0 D. What is the distance from the
lens to the focused image?
A. 0.14 m C. 0.33 m
B. 0.20 m D. 0.45 m
7. If plane polarized light is sent through two polarizers,
the first at 45° to the original plane of polarization and
the second at 90° to the original plane of polarization,
what fraction of the original polarized intensity passes
through the last polarizer?
A. 1
⁄10 B. 1⁄4 C. 1⁄2 D. 1⁄8
8. A diffracting grating with 600 lines per millimeter is
illuminated normally by a monochromatic light of
wavelength 600 nm. The number of fringes seen
excluding the central fringe is:
A. 5 B. 2 C. 3 D. 4
9. A pipe closed at one end and containing air, is made to
oscillate such that its third overtone is 2800 Hz. Which
of the following is its fundamental frequency?
A. 933 Hz C. 700 Hz
B. 400 Hz D. 560 Hz
10. In an experiment to determine the heat capacity of a
metal heat was supplied at a steady rate of 1000 Js-1.
Figure 2 shows the variation of temperature with time.
If the mass of the metal is 7.5 kg, then the value for the
specific heat capacity of the metal would be;
A. 333.3 C. 3000
B. 53.3 D. 1875
11. A capacitor of capacitance 120 𝜇𝐹 is charged by a
9.0 𝑉 battery through a resistor of 80 kΩ. The time taken
for the capacitor to acquire 75 % of its final charge in
seconds is:
A. 9.9 B. 6.7 C. 13.3 D. 13.8
12. Two identical and similarly charged tennis balls, X and
Y, each of mass 1.5 g are suspended from a support
as shown in figure 3.
The electrostatic force between the two balls is
A. 1.47 x 10-2 N C. 1.92 x 10-2 N B. 2.29 x
10-2 N D. 3.01 x 10-2 N
13 An object of mass m is located on the surface of a
spherical planet of mass M, radius R and surface field
strength, g. If G is the gravitational constant, then the
escape speed from the planet depends one of the
following?
A. M B. G C. m D. R
14. In the year 2013, a laboratory held a stock of 4.0 mg of
a radioactive isotope which has a half-life of 2.0 years.
The stock was originally purchase in the year 2005. The
quantity of the isotope that was bought in the first place
in mg is:
A. 0.32 B. 64.0 C. 16.0 D. 0.25
15. Why is a stress-strain characteristic preferred to a force
extension graph in describing the mechanical behaviour
of a material?
