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.
0.8 J
1.8 J
9.0 J
18.0 J
Correct answer is B
Work done = product of the charge Q, and the p.d V.
(i)/e work done = Q.V = 600 x 10-6 x 3.0 x 10-3 = 1.8 J.
864 NC-1
150 NC-1
144 NC-1
18 NC-1
Correct answer is A
In general, electric field strength E = (F)/q
E = \(\frac{q}{4\pi\varepsilon_0d^2}\)
⇒ 360 = \(\frac{9\times10^9\times50\times10^-6}{d^2}\)
solving, we have \(d^2\) = 1250
putting \(d^2\) = 1250 into the second equation,
E = \(\frac{9\times10^9\times120\times10^-6}{1250}\)
we have E = \(864NC^-1\)
The production of pure spectrum could easily be achieved using a?
glass prism with a pin
triangular prism with two convex lens
traingular prism only
triangular prism with two concave lenses
Correct answer is B
No explanation has been provided for this answer.
Simple microscope
refecting lens
compound microscope
projector
Correct answer is A
No explanation has been provided for this answer.
4.5 x 10-11s
4.5 x 10-10s
4.5 x 10-12 s
3.0 x 10-10s
Correct answer is A
N = 1.5 = (speed of light in glass)/speed of light in air
(1.5)/1 = (3.0 x 108)/V
V = (3.0 x 108)/1.5
V = 2.0 x 108 ms-1
But x = Vt
t = (x)/Vt
t = (x)/v = \( \frac{9 x 10^{-3}}{2.0 x 10^8}\)
∴ Time = 4.5 x 10\(^{-11}\)S