UTME CBT FREE Practice Test – Physics (Score 70% and Above and WIN FREE Airtime)

The diagram shows two capacitors P and Q of capacitance and . Find the charges stored in P and Q respectively.

A. 200 μC and 100 μC    B. 100 μC and 200 μC    C. 4 μC and 2 μC    D. 2 μC and 4 μC

A stone of mass 1 kg is dropped from a height of 10 m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to

A. its kinetic energy on the ground
B. twice its initial potential energy
C. its initial potential energy
D. half its initial potential energy

If current flows in the direction of the arrows in the solenoid above, the North pole is at

A. P    B. X   C. Q    D. Y

If the frequency of an emitted x-ray is 1.6 x 10¹⁶ Hz, the accelerating potential is ________
[ e = 1.6 x 10^-19 C, h = 6.63 x 10^-34 Js]

A. 6.6 V    B. 66.3 V    C. 663.0 V    D. 6630.0 V

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.

I. The earth is not spherical but elliptical in shape
II. Variation in latitude and longitude
III. Rotation of the earth on its axis
IV. Variation in the density of the earth.

On which combination of the above does the weight of an object vary on the earth’s surface?

A. I, II III and IV   B. II, III and IV only   C. I, II and III only   D. I and II only

A string is fastened tightly between two walls 24 cm apart. The wavelength of the second overtone is __

A. 24 cm    B. 16 cm    C. 12 cm    D. 8 cm

The primary coil of a transformer has N turns and is connected to a 120 V a.c. power line. If the secondary coil has 1,000 turns and a terminal voltage of 1200 volts, what is the value of N?

A. 120   B. 100   C. 1000   D. 1200

The pressure of a given mass of a gas changes from 300 Nm^-2 to 120 Nm^-2 while temperature drop from 127^oC to -73^oC. The ratio of the final volume to the initial volume is ___

A. 2:5    B. 5:4    C. 5:2    D. 4:5

The diagram represents a transverse electromagnetic wave travelling with speed 3.0 x 10⁸ ms^-1. What is the frequency of the wave?

A. 3.0 x 10⁷ Hz     B. 9.0 x 10⁷ Hz     C. 1.0 x 10⁹ Hz     D. 3.0 x 10⁹ Hz

An electron of charge 1.6 x 10^-19 C and mass 9.1 x 10^-31 kg is accelerated between two metal plates with a velocity of 4 x 10⁷ ms^-1. The potential difference between the plates is __

A. 4.55 x 10¹ V    B. 9.10 x 10¹ V    C. 4.55 x 10² V    D. 4.55 x 10³ V

I. Its velocity is constant
II. No work is done on the body.
III. It has constant acceleration directed away from the center
IV. The centripetal force is directed towards the center.

Which combination of the above is true of a body moving with constant speed in a circular track?

A. I and III    B. I and IV    C. II and III    D. II and IV

The cost of running five 60 W lamps and four 100 W lamps for 20 hours. If electrical energy costs N10.00 per kwh, the cost of power consumed is __

A. N 280.00   B. N 160.00   C. N 120.00   D. N 140.00

A resistance R is connected across the terminal of an electric cell of internal resistance 2 Ω and voltage was reduced to of its nominal value. The value of R is

A. 3 Ω    B. 2 Ω   C. 1 Ω   D. 6 Ω

The figure above represents a frictionless pulley system in which a weight, W is in equilibrium with a weight of 40N. Find the value of W

A. 13.3 N    B. 20.0 N    C. 40.0 N    D. 80.0 N

A transverse wave is applied to a string whose mass per unit length is 3 x 10^-2 kgm^-1 .If the string is under a tension of 12 N, the speed of propagation of the wave is ______

A. 40 ms^-1    B. 30 ms^-1    C. 20 ms^-1    D. 5 ms^-1

A gas would serve as an electrical conductor under ______

A. reduced pressure and reduced potential
B. reduced pressure and high current
C. increased magnetic field
D. exposure to visible light

The core of an efficient transformer should consist of laminated pieces of metal in order to ___

A. increase the heat produced by increasing the eddy current.
B. increase the heat produced by reducing the eddy current
C. reduce the heat produced by increasing the eddy current
D. reduce the heat produced by reducing the eddy current.

The thermometric substance of an absolute thermometer is ___

A. alcohol    B. mercury    C. helium    D. platinum

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

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

What is the speed of a particle of mass 10^-27 kg whose wavelength is 10^-8 m? [h = 6.63 x 10^-34 Js]

A. 6.63 ms^-1    B. 66.30 ms^-1    C. 663.00 ms^-1    D. 6630.00 ms^-1

The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for ____

A. improving the sharpness
B. creating an inverted image
C. magnification of the image
D. erection of the image

The diagram shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective contents of P, Q and R?

A. Alcohol, mecury and alcohol
B. Air, alcohol and mercury
C. Mecury, alcohol and mecury
D. Air, mecury and alcohol