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.
I and III only
I, II and IV only
II, III and V only
II and IV only
Correct answer is D
Convex (converging) lenses can form either real or virtual images, whereas concave (diverging) lenses can form only virtual images
Determine the speed of the wave.
64 cm/s
32 cm/s
24 cm/s
72 cm/s
Correct answer is D
Speed = Wavelength x Frequency
or
V = fλ, where frequency = 1/period, f = 1/T.
The period was given as 0.125sec and wavelength = 9cm
: f = 1/T = 1/0125 = 8.
V = fλ = 8 × 9 = 72m/s
Determine the values of the amplitude and wavelength, respectively, of the wave.
8 cm; 27 cm
8 cm; 9 cm
4 cm; 9 cm
16 cm; 27 cm
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about the universal gravitational constant, G, is true?
It is fundamental quantity
It has dimension M-¹L³T-²
Its S.I. unit is N m\(^2\)kg
It is a vector quantity
Correct answer is B
The universal Gravitational constant(G) is a scalar quantity as it is not in a particular direction.
dimensional formula =M-¹L³T-²
S.I. unit = Nm\(^2\)/kg\(^2\)
A current of 2A passes through a wire of resistance 4Ω for 3 minutes. Calculate the energy lost
960J
1440J
2880J
48J
Correct answer is C
Power = current[I]\(^2\) * Resistance[R] → 2\(^2\) * 4 → 4 * 4 = 16watts
time = 3minutes → 3 * 60 = 180s
Energy = power * time → 16 * 180 = 2880j