NEET Minor Test - 3 - NEET MCQ

The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2, then the viscous force acting on the ball will be

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is :

A small hole of area of cross-section 2mm² is present near the bottom of a fully filled open tank of height 2m. Taking g = 10m/s², the rate of flow of water through the open hole would be nearly

A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 × 10⁻²N/m.

The pressure inside the bubble equals at a point Z₀ below the free surface of water in a container. Taking g = 10m/s², density of water = 10³kg/m³, the value of Z₀ is

The stress-strain curves are drawn for two different materials X and Y. It is observed that the ultimate strength point and the fracture point are close to each other for material X but are far apart for material Y. We can say that materials X and Y are likely to be (respectively)

Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by ∆l on applying a force F, how much force is needed to stretch the second wire by the same amount?

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K₁ and K₂ The thermal conductivity of the composite rod will be

A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is

A rectangular film of liquid is extended from (4cm × 2cm) to (5cm × 4cm). If the work done is 3 × 10⁻⁴J, the value of the surface tension of the liquid is

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100°C, while the other one is at 0°C. If the two bodies are brought into contact, then, assuming no heat loss, the final common temperature is

Coefficient of linear expansion of brass and steel rods are α₁ and α₂. Length of brass and steel rods are l₁ and l₂ respectively. If (l₂ − l₁) is maintained same at all temperatures, which one of the following relations holds good?

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250nm is U₁, at wavelength 500 nm is U₂ and that at 1000 nm is U₃ Wien's constant, b = 2.88 × 10⁶nmK. Which of the following is correct?

An airplane of a total wing area of 120 m² is in a level flight at some height. If the pressure difference between the upper and lower surface is 2.5 kPa, then the mass of the airplane is: [Take g = 10 ms-2]

A liquid is poured into three vessels of the same base area and equal heights as shown in the figure, then:

If pressure at half the depth of a lake is equal to 2/3rd the pressure at the bottom of the lake, then the depth of the lake is:

The value of g at a place decreases by 2%. Then, the barometric height of mercury:

A siphon in use is demonstrated in the following figure. The density of the liquid flowing in the siphon is 1.5 gm/cc. The pressure difference between the point P and S will be:

From the adjacent figure, the correct observation is:

A diver is 10 m below the surface of water. The approximate pressure experienced by the diver is-

The area of cross-section of the wider tube shown in the figure is 800 cm². If a mass of 12 kg is placed on the massless piston, then the difference in heights h of the levels of water in the two tubes will be:

The height of a mercury barometer is 75 cm at sea level and 50 cm at the top of a hill. The ratio of density of mercury to that of air is 10⁴. The height of the hill is:

A vertical U-tube of uniform inner cross section, contains mercury in both its arms. A glycerin (density = 1.3 g/ cm³) column of length 10 cm is introduced into one of its arms. Oil of density 0.8 gm/ cm³ is poured into the other arm until the upper surfaces of the oil and glycerin are at the same horizontal level. Find the length of the oil column. [Density of mercury = 13.6 g/cm³]

The value of the coefficient of volume expansion of glycerin is 5 x 10^-4 K^-1. The fractional change in the density of glycerin for a temperature increase of 40°C will be:

When a uniform rod is heated, which of its following properties will increase as a result of it?

If two rods of length L and 2L having coefficients of linear expansion α and 2α respectively are connected so that their total length becomes 3L, the average coefficient of linear expansion of the composition of rods equals:

Two rods, one made of aluminium and the other made of steel, having initial lengths l₁ and l₂ are connected together to form a single rod of length l₁ + l₂. The coefficient of linear expansion for aluminium and steel are α_a and α_s respectively. If the length of each rod increases by the same amount when their temperature is raised by t°C, then the ratio

A large steel wheel is to be fitted onto a shaft of the same material. At 27 °C, the outer diameter of the shaft is 8.70 cm and the wheel's central hole has a diameter of 8.69 cm. The shaft is cooled using ‘dry ice’. At what temperature of the shaft does the wheel slip on the shaft? (Assume the coefficient of linear expansion of the steel to be constant over the required temperature range and α steel = 1.20 × 10⁻⁵K⁻¹)