Question 1

Which of the following best describes a scalar quantity?

Accepted Answer

A quantity consisting only of magnitude.

Question 2

A car accelerates from rest to a velocity of $$20\ \mathrm{m/s} in$$ $$5\ \mathrm{s}. $$What is its average acceleration?

Accepted Answer

$$4\ \mathrm{m/s^2$}$$

Question 3

Which of the following is a derived unit?

Accepted Answer

Newton

Question 4

A ball is dropped from a height and falls freely under gravity. Which statement is true about its motion?

Accepted Answer

The ball accelerates at a constant rate.

Question 5

Which equation correctly relates work, force, and displacement?

Accepted Answer

$$W = F 	imes d$$

Question 6

A $$2\ \mathrm{kg}$$ object is moving at $$3\ \mathrm{m/s}. $$What is its momentum?

Accepted Answer

$$6\ \mathrm{kg\cdot m/s}$$

Question 7

Which of the following best describes an elastic collision?

Accepted Answer

A collision in which the total kinetic energy is conserved.

Question 8

A spring with a spring constant $$k = 200\ \mathrm{N/m} is $$compressed by $$0.1\ \mathrm{m}. $$What is the elastic potential energy stored in the spring?

Accepted Answer

$$1\ \mathrm{J}$$

Question 9

Which statement about pressure is correct?

Accepted Answer

Pressure is the force per unit area.

Question 10

Which of the following is the correct formula for the frequency of a wave?

Accepted Answer

$$f = \dfrac{1}{T}$$

Question 11

A sound wave travels at $$340\ \mathrm{m/s}$$ and has a frequency of $$1700\ \mathrm{Hz}. $$What is its wavelength?

Accepted Answer

$$0.2\ \mathrm{m}$$

Question 12

Which phenomenon explains why a straw appears bent when placed in a glass of water?

Accepted Answer

Refraction

Question 13

In Young's double slit experiment, what causes the bright and dark fringes on the screen?

Accepted Answer

Constructive and destructive interference of light waves.

Question 14

Which of the following best describes a standing wave?

Accepted Answer

A wave with two fixed ends that vibrates at specific frequencies.

Question 15

Which law states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them?

Accepted Answer

Coulomb's law

Question 16

A $$10\ \Omega$$ resistor and a $$20\ \Omega$$ resistor are connected in series. What is the total resistance?

Accepted Answer

$$30\ \Omega$$

Question 17

Which of the following is the correct definition of half-life?

Accepted Answer

The time taken for the mass of a material to be equal to half its original amount.

Question 18

Which of the following is true about beta decay?

Accepted Answer

A neutron decays to a proton and an electron, and the electron is emitted.

Question 19

Which of the following is the correct formula for power in terms of work and time?

Accepted Answer

$$P = \dfrac{W}{t}$$

Question 20

A transformer is used to increase the voltage from $$120\ \mathrm{V} to$$ $$480\ \mathrm{V}. If $$the primary coil has $$100$$ turns, how many turns should the secondary coil have?

Accepted Answer

$$400$$

Comprehensive Physics Study Notes: Fundamental Concepts, Mechanics, Waves, Electricity, and Nuclear Physics

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