Determine the distance between the consecutive antinodes XX if the wavelength is 60cm

• A. 15cm
• B. 30cm
• C. 60cm
• D. 120cm

Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?

• A. Carbondioxide gas
• B. Liquid sodium metal
• C. Concrete shield
• D. Graphite rods

If a charged ion goes through combined electric and magnetic fields, the resultant emergent velocity of the ion is

• A. E/B
• B. EB
• C. B/E
• D. E - B

The tendency for a stationary body to continue to remain at rest when a force is applied to it is known as

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

An ice cube has mass of 20 g at 5°C. Calculate the energy required to raise its temperature to 0°C. [Specific heat capacity of ice = 2.1 J/g°c]

• A. 105 J
• B. 100 J
• C. 42 J
• D. 210 J

Viscosity in a liquid does not depend on the

• A. nature of the liquid
• B. relative velocity between the liquid layers
• C. area of the surfaces in contact
• D. normal reaction between the liquid layers

When impurities are added to semi-conductors, the conductivity of the semi-conductor

• A. increases then decreases
• B. increases
• C. decreases
• D. remains constant

Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is

• A. 1:2
• B. 2:1
• C. 8:9
• D. 9:8

Which of the following is not a product of nuclear fission?

• A. Alpha particle
• B. Beta particle
• C. Gamma ray
• D. X-ray

Which of the following statement about latent heat of vaporization is correct? It

• A. weakens the adhesive force between molecules of a liquid and those of its container
• B. breaks completely the force of attraction completely between the molecules of a liquid
• C. add to the heat content of a liquid
• D. increases the cohesive forces between liquid molecules