A practical application of total internal reflection is found in
- A. rainbow
- B. diverging lens
- C. converging lens
- D. fiber optics
The land and sea breeze is attributed to
- A. conduction and radiation
- B. conduction
- C. radiation
- D. convection
An effort of 40N is applied on a machine to lift a mass of 60kg. Determine the mechanical advantage of the machine [ g = 10ms\(^2\) ]
- A. 2400
- B. 240
- C. 150
- D. 15
The energy stored in the above capacitor is
- A. 2.25J
- B. 6.25J
- C. 18.25J
- D. 24.25J
The defect of the eye lens which occurs when the ciliary muscles are weak is
- A. Spherical aberration
- B. Astigmatism
- C. Presbyopia
- D. Myopia
Calculate the power of an object which moves through a distance of 500cm in 1s on a frictionless surface by a horizontal force of 50N
- A. 200W
- B. 300W
- C. 350W
- D. 250W
The charge of magnitude 1.6 x 10 \(^{-19}\)C is placed in a uniform electric field of intensity 1200Vm\(^{-1}\). Calculate its acceleration, if the mass of the charge is 9.1 x 10\(^{-31}\)kg
- A. 2.11 x 10\(^{14}\)ms\(^{-2}\)
- B. 2.11 x 10\(^{13}\)ms\(^{-2}\)
- C. 1.20 x 10\(^{14}\)ms\(^{-2}\)
- D. 1.20 x 10\(^{13}\)ms\(^{-2}\)
The power of a convex lens of focal length 20cm is
- A. 0.05D
- B. 0.50D
- C. 5.00D
- D. 50.00D
I It wets glass
II It needs to be coloured
III It has a low density
Water is not suitable for use as a thermometric liquid because
- A. I only
- B. I and II only
- C. I, II, and III only
- D. II and III only
The quantity of heat required to melt ice of 0.2 kg whose specific latent heat is 3.4 x 10\(^5\)J/Kg is
- A. 6.8 x 10\(^4\)J
- B. 8.6 x 10\(^4\)J
- C. 1.7 x 10\(^5\)J
- D. 1.7 x 10\(^6\)J
In a Hare’s apparatus, the height of water and a liquid X are 0.3m and 0.5m respectively. The relative density of x is?
- A. 0.4
- B. 0.6
- C. 1.7
- D. 2.0
An object is placed 25cm in front of a convex mirror has its image formed 5cm behind the mirror. what is the focal length of the convex mirror
- A. 8.20cm
- B. 6.25cm
- C. 5.60cm
- D. 4.50cm
The value of R in the above circuit to make the galvanometer measure 2A is
- A. 0.128\(\Omega\)
- B. 0.256\(\Omega\)
- C. 0.612\(\Omega\)
- D. 1.00\(\Omega\)
The capacitance of a capacitor, C, is inversely proportional to
- A. area of the plate
- B. dielectric substance
- C. distance between plate
- D. direction of the plate
Two tuning forks of frequencies 6Hz and 4Hz respectively are sounded together. The beat frequency is
- A. 2Hz
- B. 5Hz
- C. 8Hz
- D. 10Hz
The tangential force acting on an object that opposes it from sliding freely on the adjacent surface is called
- A. Normal force
- B. Friction force
- C. Weight
- D. Upthrust
The gravitational force between two objects masses 10\(^{24}\)kg and 10\(^{27}\)kg is 6.67N. Calculate the distance between them [ G = 6.6 x 10\(^{-11}\)Nm\(^2\)kg\(^{-2}\) ]
- A. 1.0 x 10\(^{20}\)m
- B. 2.0 x 10\(^{-20}\)m
- C. 1.0 x 10\(^{-20}\)m
- D. 2.0 x 10\(^{20}\)m
What will be the weight of a man of mass 60kg standing in a lift if the lift is descending vertically at 3ms\(^2\)?
- A. 780N
- B. 546N
- C. 660N
- D. 420N
Calculate the depth of a swimming pool if the apparent depth is 10cm. ( Refractive index of water = 1.33 )
- A. 7.5cm
- B. 10.0cm
- C. 13.3cm
- D. 6.87cm
An ideal transformer has
- A. Maximum primary resistance
- B. No flux leakage
- C. Hysteresis
- D. Eddy current
The gravitational force between two objects is 10N, what is the new value of the force if the distance between them is halved?
- A. 10N
- B. 20N
- C. 40N
- D. 80N