UTME CBT FREE Practice Test – Physics

A magnetic needle is suspended first at the earth’s north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are _____ 

A. 0° and 0°    B. 60° and 60°    C. 90° and 90°   D. 0° and 90°.

Which of the following electromagnetic waves has the shortest wavelength?

A. Radio waves     B. X rays     C. infra-red     D. Blue light

Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of the forces the masses experience.

A. 1:4    B. 2:1    C. 2:3    D. 2:5

A particle accelerates uniformly from rest at 6.0 ms^-2 for 8 s and then decelerates uniformly to rest in the next 5 s. Determine the magnitude of the deceleration.

A. 9.6 ms^-2     B. 24.0 ms^-2     C. 30.0 ms^-2     D. 48.0ms^-2

In an electrolysis experiment, a cathode of mass 5g is found to weigh 5.01 g after a current of 5 A flows for 50 seconds. What is the electrochemical equivalent of the deposited substance?

A. 0.00004 g/C     B. 0.00002 g/C     C. 0.02500 g/C     D. 0.05000 g/C

A piece of substance of specific heat capacity 450J kg^-1k^-1 falls through a vertical distance of 20 m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10 ms^-2]

The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by

A. conduction     B. evaporation    C. radiation    D. convection

It is known that a neutron exists in a light atomic nucleus, Which of the following also exists in the nucleus?

A. an electron     B. a β-particle     C. an α particle     D. a proton

In what range of temperature is the expansion of water anomalous?

A. +208°C to ±212°C       B -80°c + -76°C       C. -4°C to 0°C       D +96°C to + 100oC
E. 0°C to + 4°C

Which of the following metals will provide the greatest shield against ionization radiation?

A. Iron    B. Manganese    C. Aluminium    D. Lead

Which of the following quantities has the same unit as energy?

A. Power    B. Work    C. Force    D. Momentum

A pressure cooker saves both time and fuel in cooking because inside the cooker, the ______ 

A. boiling point of water ¡s raised
B. pressure ¡s constant
C. heat is completely trapped
D. temperature is evenly distributed

Natural radioactivity consists of the emission of _______ 

A. α-particles and β-rays
B. α-particles and X-rays
C. γ-rays and X-rays
D. α-particles, β-rays and γ-rays

An astronomical telescope is said to be normal adjustment when the ________

A. eye is accommodated
B. focal length of objective lens is longer than that of eye piece.
C. final image is at the near point of eye
D. final image is at infinity.

Which of the following statements is NOT true of the image in a plane mirror? The image is _____ 

A. the same size as the object     B. laterally inverted    C. virtual    D. magnified

The diagram shows the prism arrangement in a _____

A. binocular    B. spectrometer    C. periscope    D. projector.

In the diagram above, which of the simple pendula will resonate with P when set into oscillation?

A. T     B. U       C. R and T        D. Q and R

If a spherical metal bob of radius 3 cm is fully immersed in a cylinder containing water and the water level rises by 1 cm, what is the radius of the cylinder?

A. 12 cm    B. 1 cm    C. 3 cm    D. 6 cm

In a resonance tube experiment which is illustrated above, the velocity of sound in air is 327.68 m/s, the frequency of the tuning fork used is therefore ______

A. 128 Hz    B. 256 Hz    C. 512 Hz    D. 768 Hz

The value of the series resistance required to convert the above galvanometer into a voltmeter with a full range deflection of 15 V is _______

A. 985 ohms   B. 990 ohms    C. 995 ohms    D. 1,000 ohms

The diagram shows a magnet X with its south pole moved along a soft-iron bar PQ in the direction shown. After some time, the poles at P and Q respectively are ______

A. North-North    B. North-South    C. South-North    D. South-South

In the diagram below, determine the r.m.s current.

A. 31 A    B. 48 A    C. 60 A    D. 80 A

A 3000 W electric cooker is to be used on a 200 V mains circuit. Which of the fuses below can be used safely with the cooker?

A. 2 A   B. 5 A    C. 10 A    D. 15 A

Two capacitors of capacitances 0.4 μF and 0.5 μF are connected in parallel and charged to a p.d. of 50V. Determine the total charge acquired.

A. 45μC     B. 25μC     C. 20μC     D. 10μC

A hand bag containing some load weighing 162 N is carried by two students each holding the handle of the bag next to him. If each handle is pulled 60^o to the vertical, find the force on each student’s arm.

A. 324 N    B. 162 N    C. 121 N    D. 81 N

Nuclear fission is preferred to nuclear fusion in the generation of energy because

A. very high temperatures are required for fusion
B. the raw materials for fusion are easily obtained
C. energy obtained from fusion is relatively smaller
D. the bye products of fusion are very dangerous

Which of the following sources of energy is renewable?

A. Sun    B. Petroleum    C. Coal    D. Uranium

In a series, R-L-C circuit at resonance, the voltage across the resistor and the inductor are 30 V and 40 V respectively. What is the voltage across the capacitor?

A. 30 V    B. 40 V    C. 50 V    D. 70 V

The image of an object formed by a convex mirror is

A. real, erect and enlarged
B. real, inverted and enlarged
C. virtual, erect and diminished
D. virtual, erect and enlarged

The name given to the characteristic behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is ______

A. magnetisation.    B. paramagnetism    C. diamagnetism   D. demagnetization

When equal weights of iron and water are subjected to an equal supply of heat, it is found that the piece of iron becomes much hotter than water after a shorter time because _____ 

A. the specific heat of iron ¡s higher than that of water
B. iron is in solid form
C. water is in liquid form
D. the Specific heat of water is higher than that of iron

A direct current of 5 A flows through a 0.2 H inductor. Calculate the energy stored in the inductor.

A. 0.5 J    B. 1.0 J    C. 2.5 J    D. 5.0 J

A transformer is required to supply 12 V_rms to operate a toy train set from a 240 V_rms. If the number of turns in the secondary coil is 100, calculate the number of turns required in the primary coil.

A. 5    B. 12    C. 2000    D. 2400

At resonance, the phase angle in an a.c. circuit is ____

A. 90^o    B. 60^o    C. 0^o   D. 180^o

The diagram is a block-and-tackle pulley system in which an effort of 80 N is used to lift a load of 240 N. The efficiency of the machine is ____

A. 60%   B. 50%   C. 40%   D. 33%

Which of the following statements about an object performing simple harmonic motion is correct? Its acceleration

A. is maximum at the extreme ends
B. is constant and directed towards a fixed point
C. is zero when it is displaced from the equilibrium position.
D. varies linearly with the displacement from a fixed point and is directed towards the fixed point.

A gas with initial volume 2 x 10^-6 m³ is allowed to expand six times its initial volume at constant pressure of 2 x 10⁵ Nm^-2. The work done is ___

A. 2.0 J    B. 4.0 J    C. 12.0 J    D. 1.2 J

What is the resultant of the circuit shown above? 

A. 11 Ω   B. 8 Ω    C. 4 Ω    D. 3.6 Ω

Which of the following actions will not increase the sensitivity of a moving coil galvanometer

A. Using a strong temporary magnet
B. Increasing the area and number of turns of the coil
C. Using a weak hair spring
D. Using a light pointer.

A particle of mass 10^-2 kg is fixed to the tip of a fan blade which rotates with angular velocity of 100 rads^-1. If the radius of the blade is 0.2 m, the centripetal forces is _____

A. 2 N    B. 20 N    C. 200 N    D. 400 N