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.
8V
10V
12V
16V
Correct answer is C
Net e.m.f = (8 x 2) - (2 x 2)
The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by
convection
conduction
radiation
evaporation
Correct answer is A
No explanation has been provided for this answer.
877Jkg-1K-1
286Jkg-1K-1
133Jkg-1K-1
92Jkg-1K-1
Correct answer is C
Let the specific heat cap. of the metal = C
∴ Heat lost by the metal = heat gained by the Calorimeter + Water
∴ 0.5 x C x [100 - 25]
80 x [25 - 15] + 420 [25 - 15]
0.5 x C x 75 = 80 x 10 + 420 x 10
37.5C = 800 + 4200
C = 5000/37.5 = 133.3Jkg-1K-1
stationary and longitudinal
stationary and transverse
progressive and transverse
progressive and longitudinal
Correct answer is A
The vibrator is fixed at the end of the rope, hence, it is stationary. Also, the wave in this case, as well as the vibration are in the same direction, hence, it is longitudinal.
decreased steadily
remained unchanged
increased steadily
was least on Day 1
Correct answer is C
| 1 | 2 | 3 | |
| Dry | 30°C | 29°C | 25°C |
| Wet | 22°C | 22°C |
21°C |
|
Diff |
8°C | 7°C | 4°C |
\(Relative Humidity \propto \frac{1}{temp}\)
Hence, the relative humidity increases steadily