Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The product of force and time is?
Impulse
Momentum
Inertia
Friction
Correct answer is A
An impulse is equal to the net force on the object times the time period over which this force is applied. Impulse is derive from the equation F = ma, which comes from Newton's second law of motion
Temperature is the property of a body which is proportional to the ____.
total kinetic energy of its molecules
average kinetic energy of its molecules
average speed of its molecules
maximum speed of its molecules
Correct answer is B
The last postulate of the kinetic molecular theory states that the average kinetic energy of a gas particle depends only on the temperature of the gas. Thus, the average kinetic energy of the gas particles increases as the gas becomes warmer
What flows to the positively charged conductor by connecting it to the earth?
Electrons
Ion
Neutron
Proton
Correct answer is A
Earth acts as a ground of zero potential. So when a positively charged conductor is connected to the earth, positive charge flows into the earth and as a result, electrons flow from earth to the conductor.
15.0oC
45.0oC
52.5oC
60.0oC
Correct answer is B
Time = 2mins = 2 × 60 = 120secs
Energy = power × time
1000 × 120 = 120,000J
Energy = mc(θ2 – θ1)
120,000 = 2 × 4000(θ2 – θ1)
θ2 = 30 + 15 = 45 o C
15o
18o
22o
24o
Correct answer is C
X = 43 r = ?
Shell’s law:. = Sini0Sinr0
= Sin300Sinr0
Sinr0 = 3Sin3004
Sin r0 = 0.375
R o = Sin-1 (0.375)
R o = 22.02 o
R o = 22 o