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.
2.3x\(10^{1}J\)
2.3x\(10^{2}J\)
2.3x\(10^{4}J\)
2.3x\(10^{5}J\)
3.3x\(10^{7}J\)
Correct answer is D
\(\Delta{H}=mL=0.1\times2.3\times10^6=2.3\times10^5\)J
2.4 x\(10^{-2}cm^{-3}\)
1.6 x\(10^{-2}cm^{-3}\)
8 x\(10^{-2}cm^{-3}\)
5 x\(10^{-2}cm^{-3}\)
4 x\(10^{-2}cm^{-3}\)
Correct answer is A
\(3{\alpha}= \frac{\Delta{V}}{V_1\Delta{T}}\Rightarrow \frac{\Delta{V}}{100\times40}=3\alpha\, where\, \alpha = 2 \times 10^{-6}\\ \frac{\Delta{V}}{4000}=6\times10^{-6}\Rightarrow \Delta=4\times10^3\times6\times10^{-6}= 2.4\times10^{-2}cm^{-3}\)
Whenever light waves are restricted to a specific plane they are said to be
Diffracted
Refracted
Diffused
Regularly reflected
Plane polarized
Correct answer is E
No explanation has been provided for this answer.
2cm
3.3cm
4cm
5cm
15cm
Correct answer is C
M=\(\frac {v}{u}=5\Rightarrow v=5u=20,let u be x\\ v=5x if v=20 then 5x=20 therefore x=20/5=4\,u=4cm\)
Diffraction
Reflection
Refraction
Polarisation
Interference
Correct answer is C
No explanation has been provided for this answer.