A gas at a volume of V₀ in a container at pressure P₀ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?

• A. P₀/5
• B. 4P₀/5
• C. P₀
• D. 5P₀

State one reason each why cathode rays:

(a) are not electromagnetic waves;

(b) cast sharp shadows of objects in their path;

(c) can rotate a light paddle wheel inside a discharge tube.

An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and has a magnification of 2. What is the distance of the object from the lens?

• A. 5cm
• B. 10cm
• C. 30cm
• D. 40cm

Which of the following CANNOT be deflected by both electric and magnetic fields?

• A. Gamma rays
• B. Alpha particles
• C. Wave particles
• D. Beta particles

Images formed by a convex mirror are always

• A. inverted, real and diminished
• B. inverted, virtual and diminished
• C. erect, virtual and diminished
• D. erect, real and magnified

The focal length of the eye-piece of an astronomical telescope is f₁, while the focal length of the object is f₂. From normal adjustment, the angular magnification is given by

• A. \(\frac{f_2}{f_1}\)
• B. 1 - \(\frac{f_2}{f_1}\)
• C. \(\frac{f_2}{f_1}\) - 1
• D. \(\frac{f_1}{f_2}\)

The diagram below illustrates a Hare's apparatus. \(\mathit{e}_1, \mathit{e}_2\) represent densities and \(\mathit{h}_1, \mathit{h}_2\) heights of columns of liquids. Which of the following equations is correct?

• A. \(\mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_1}{\mathit{e}_2}\)
• B. \(\mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_2}{\mathit{e}_1}\)
• C. \(\mathit{h}_1 = \frac{\mathit{e}_1 \mathit{e}_2}{\mathit{h}_2}\)
• D. \(\mathit{h}_1 = \frac{\mathit{e}_1}{\mathit{h}_2 \mathit{e}_2}\)

The action of blotting paper on ink is due to

• A. diffusion
• B. osmosis
• C. capillarity
• D. surface tension

Equal masses of copper and rubber are raised to the same temperature. After sometimes, the copper was observed to be at a lower temperature because

• A. the specific heat capacity of copper is lower than that of rubber
• B. copper expands more than rubber
• C. the specific heat capacity of rubber is lower than that of copper
• D. rubber expands more than copper

The tendency of a body to remain at least when a force is supplied to it is called

• A. impulse
• B. momentum
• C. inertia
• D. friction