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.
2.5 x 107N
5.0 x 104N
5.0 x 102N
2.0 x 10-3N
Correct answer is B
Thrust = \(\frac{\text{mass x velocity}}{time}\)
= 10 x 5 x 103
= 5.0 x 104N
cos\(\theta\) = \(\frac{3}{7}\)
sin\(\theta\) = \(\frac{3}{7}\)
tan\(\theta\) = \(\frac{3}{7}\)
cot\(\theta\) = \(\frac{3}{7}\)
Correct answer is C
\(\theta\) = tan-1\(\frac{3}{7}\)
27%
14%
9%
3%
Correct answer is C
Actual thickness = 34 - 22 = 12
error thickness = 30 - 20 = 10
error = 12 - 10 = 2mm that is, (11 ± 1)mm
%error = \(\frac{1}{11}\) x \(\frac{100}{1}\)
= 9%
Which of the following quantities has the same unit as the watt?
Force x time
Force x distance
Force x acceleration
Force x velocity
Correct answer is D
No explanation has been provided for this answer.
no electron will be emitted
the few electrons emitted will have a maximum kinetic energy of 1eV
the few electrons emitted will have a maximum kinetic energy of 3eV
many electrons will be emitted
Correct answer is A
An electron can only be emitted if photon energy is equal or greater than work function of the plate