A body is pulled on a horizontal surface with a rope inclined at 30º to the vertical. If the effective force pulling the body along the horizontal surface is 15N, calculate the tension on the rope.
- A. 30N
- B. 60N
- C. 22.5N
- D. 75N
A particular household utilizes three electrical appliances for six hours daily if the appliances are rated 80W, 100W, and 120W respectively. Calculate the electrical bills paid monthly if an average month is 31 days. [1kwh = #24.08k]
- A. ₦ 2843.22k
- B. ₦ 1950.22k
- C. ₦ 1343.66k
- D. ₦ 46.23k
At a pressure of 10\(^5\)Nm\(^{-2}\), a gas has a volume of 20m\(^3\). Calculate the volume at 4 x 10\(^5\)Nm\(^{-2}\) at constant temperature.
- A. 2m\(^3\)
- B. 3m\(^3\)
- C. 4m\(^3\)
- D. 5m\(^3\)
Calculate the upthrust on a spherical ball of volume 4.2 x 10\(^{-4}\)m\(^{3}\) when totally immersed in a liquid of density 1028kgm\(^{-3}\)
- A. 5.2N
- B. 4.3N
- C. 3.0N
- D. 2.4N
Calculate the magnetic force on an electron in a magnetic field of flux density 10T, with a velocity of 3 x 10\(^7\)m/s at 60º to the magnetic field (e = 1.6 x 10\(^{-19}\)C)
- A. 4.8 x 10\(^{-11}\)N
- B. 4.6 x 10\(^{-12}\)N
- C. 4.16 x 10\(^{-11}\)N
- D. 4.3 x 10\(^{-11}\)N
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