A ray undergoes a minimum deviation at 40o when it is incident on equilateral triangular glass prism. Calculate the refractive index of the prism
- A. 1.48
- B. 1.50
- C. 1.53
- D. 1.67
The image formed by a convex mirror is always
- A. real, erect and diminished
- B. real, inverted and diminished
- C. virtual, inverted and diminished
- D. virtual, erect and diminshed
Which of the following statements about the image formed by a plane mirror is not correct?
- A. it is laterally inverted
- B. it has unit magnifiation
- C. it is formed by actual intersection of rays
- D. its distance from the mirror is equal to that of the object from the mirror
Ether produces a cooling effect when it is poured on the hand because it has
- A. low conductivity
- B. high conductivity
- C. high latent heat of vaporization
- D. low latent heat of vaporization
A metal of mass 200g at a temperature of 100oC is placed in 100g of water at 25oC in a container of negligible heat capacity. If the final steady temperature is 30oC, calculate the specific heat capacity of the metal. [specific heat capacity of the water is 4200 Jkg-1 K-1]
- A. 150 Jkg-1K-1
- B. 300 Jkg-1K-1
- C. 320 Jkg-1K-1
- D. 1960 Jkg-1K-1
A body is pulled over a distance of 500m by a force of 20N. If the power developed is o.4 kW, calculate the time interval during which the force is applied
- A. 0.2s
- B. 2.5s
- C. 25.0s
- D. 250.0s
Which of the following assumptions is not valid for an ideal gas ?
- A. molecules of a particular gas are identical
- B. molecules moves freely throughout the volume of the container
- C. force of attraction between molecules is negligible
- D. molecules move at constant speed between collisions
Which of the following statements about anomalous expansion of water are correct? i. There is contraction between 0oC and 4oC. ii. There is expansion between 0oC and 100oC. iii. The volume is minimum at 4oC. iv. The volume is maximum at 4oC
- A. i and ii only
- B. ii and iii only
- C. i and iii only
- D. ii and iv only
Which of the following equations shows how how the linear expansivity (\(\alpha\)) and the cubic expansivity (\(\gamma\)) of a material are related?
- A. \(\gamma = \alpha\)
- B. \(\gamma = 1 - \alpha\)
- C. \(\gamma = 2 \alpha\)
- D. \(\gamma = 3 \alpha\)
A hypsometer is used for determining
- A. steam point
- B. relative humidity
- C. ice point
- D. relative density
The radius of a wheel is 30.0 cm and that of its axle is 6.0cm. Calculate the effort required to lift a load of 120.0N using this machine. Assuming 100% efficiency
- A. 600.0N
- B. 40.0N
- C. 24.0N
- D. 20.0N
Which of the following statements correctly defines a simple machine? A device
- A. that can produce electric current
- B. which can only carry people from one place to another
- C. with which work can be done easily
- D. which changes the state of rest or of uniform motion of an object
A coin is pushed from the edge of a laboratory bench with a horizontal velocity of 15.0 ms-1. If the height of the bench from the floor is 1.5m, calculate the distance from the foot of the bench to the point of impact with the floor [g = 10ms-2]
- A. 0.75m
- B. 2.25m
- C. 8.22m
- D. 15.00m
An object of mass 5.0 kg moves with a velocity of 10ms-1. Calculate its momentum.
- A. 50.0 kgms-1
- B. 15.0 kgms-1
- C. 2.0 kgms-1
- D. 0.5 kgms-1
Two simple pendulum A and B of equal lengths and of masses 5g and 20g respectively are located in the same environment. The periods TA and TB of their respective oscillations are related by the equations
- A. TA = 4TB
- B. TA = \(\frac{1}{4} T_B\)
- C. TA = TB
- D. TA = 5TB
A body of mass 120g placed at the 10cm mark on a uniform metre rule makes the rule settle horizontally on a fulcrum places at 35cm mark. Calculate the mass of the rule
- A. 60g
- B. 80g
- C. 120g
- D. 200g
A stone of mass 300g is released from rest from the top of a bulding of height 100m. Determine the kinetic energy gained by the stone when it is a quarter way down from the point of release.[g = 10 ms-2]
- A. 750.0J
- B. 225.0J
- C. 75.0J
- D. 22.5J
Which of the following propeties is not considered in choosing mercury as a thermomemetric liquid?
- A. density
- B. expansivity
- C. conductivity
- D. opacity
In the absence of gravitational force, the weight of the body is
- A. its mass
- B. zero
- C. its density
- D. its volume
The area under a velocity-time graph represents
- A. final velocity attained
- B. distance covered
- C. acceleration
- D. workdone
The property of a fluid that is used to determine its suitability as a lubricant is its
- A. capillarity
- B. viscocity
- C. surface tension
- D. relative density