When light passes through two media x and y of refraction indices 1.51 and 1.33 respectively, the speed of light in

• A) x is same as in y
• B) x and y is same as in vacuum
• C) x is higher than in y
• D) y is higher than in x

If the pressure of the vapour on top of an enclosed liquid is equal to the atmospheric pressure, what will be the temperature of the liquid enclosed?

• A) room temperature
• B) boiling point
• C) freezing point
• D) standard temperature

A heating coil rated 1000 W is used to boil off completely 2 kg of boiling water. the time required to boil of the water is_______[Special latent heat of Vaporization of water = 2.3 x 10⁶ Jkg^-1]

• A) 1.15 x 10⁴s
• B) 1.15 x 10³s
• C) 4.6 x 10⁴s
• D) 4.6 x 10³s

A plastic sphere floats in water with 50% of its volume submerged. if it floats in glycerine with 40% of its volume submerged,the density of the glycerine is?

• A) 1400 kgm^-3
• B) 1250 kgm^-3
• C) 500 kgm^-3
• D) 1000 kgm^-3

Calculate the e.m.f of the cell in the below circuit if its internal resistance is negligible.

• A) 12 V
• B) 8 V
• C) 2 V
• D) 36 V

It is observed that water will wet a clean glass because the

• A) cohesion of water to glass is stronger than the cohesion of water molecules
• B) adhesion of water molecules is weaker than the cohesion of water to glass
• C) cohesion of water to glass is weaker than the cohesion of water molecules
• D) adhesion of water molecules is stronger than the cohesion of water molecules

A binary operation ⊗ defined on the set of integers is such that m ⊗ n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

• A) −5/4
• B) −5/6
• C) 0
• D) 5

Metal cables are used as telephone wires because

• A) they are cheap
• B) they are sourced locally
• C) the speed of sound in them is very low
• D) the speed of sound in them is very high

A band of 500 rectangular loops of wire of area 20 cm by 20 cm, encloses a region of magnetic field which charges from 1.0T to 0.4T within 5 seconds, calculate the induced e.m.f.

• A) 5.60 v
• B) 24.00 v
• C) 0.24 v
• D) 2.40 v

If a cage containing a truck of coal weighing 750 kg is raised to a height of 90 m in a minute, what is the total power expended? [g = 10 ms²]

• A) 11.50 kw
• B) 12.60 kw
• C) 11.25 kw
• D) 12.10 kw