Second Physics JETS Assessment

In which of the following states of matter do the molecules vibrate about their mean positions?

Which of the following properties of a steel bar can be measured in terms of the dimension of length only?

A body of volume 0.046m3 is immersed in a liquid of density 980kgm-3 with 3/4 of its volume submerged. Calculate the upthrust on the body. [g = 10ms-2]

The following properties of a solid are measured on earth I. Weight ii. Specific heat capacity iii. density. Which of the properties will have a different value if measured in space?

The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X.

A body of mass 5kg moving with a velocity of 30ms-1 due east is suddenly hit by another body and changes its velocity to 50ms-1 in the same direction. Calculate the magnitude of the impulse received.

A stone of mass 0.5kg is dropped from a height of 12m. Calculate its maximum kinetic energy. [g = 10ms-1]

A machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine

A faulty thermometer registers 102.5DegCelcius at 100DegCelcius. If the thermometer has no zero error, what will it register at 55Degcelcius

It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses] leave your answer in minutes

When table salt is added to ice, the melting point of the ice

What instrument is used to measure relative humidity

Which of the following factors affect the rate of evaporation of a liquid? I. Exposed surface area ii Temperature of the surroundings iii. Thermal capacity of the liquid iv. Relative humidity of the surroundings

The maximum displacement of a vibrating turning fork is its

A boat is rocked by waves of speed 30ms-1 whose successive crest are 10m apart. Calculate the rate at which the boat receives the waves

Which of the following waves is not transverse

Light travelling through a small pinhole usually does not make a shadow with a distinct sharp edge because of

The angle of incidence of a ray of light on a plane mirror is 55deg. Determine the angle between the reflected ray and the mirror

A concave mirror forms a magnified and erect image only when the object is placed

A thin lens is placed 50cm from an illustrated object. The image produced has linear magnification of 1/4. Calculate the power of the lens in dioptres

Sound interference is necessary to produce the phenomenon of

A satellite in circular motion around the earth does not have

When a conductor mounted on an insulating stand is charged and left for sometime, the conductor eventually loses all its charges. This is because the

An inductor of inductance 1.0H is connected in series with a capacitor of capacitance 2.0μF in an a.c. circuit. To resonate

An ammeter connected to an a.c circuit records 5.5A. The peak current in the circuit is

The main difference between between x-rays and γ−rays lies in their

Which of the following properties of a long steel bar would alter if the bar were melted, recast into a cube and allowed to cool to its original temperature?

Which instruments is best for measuring the diameter of a thin constantan wire?

What is the density of a fuel of relative density 0.72? [Density of water = 1000kg m-3]

Which electromagnetic wave has the longest wavelength

The amplitude of a sound wave determines its

A positively charged glass rod is placed near the cap of a positively charged electroscope. The divergence of the leaf is observed to

A galvanometer of internal resistance 50Ω and full scale deflection of 20 mA is converted into a voltmeter by connecting a resistor of resistance 1950Ω in series to it. Calculate the maximum voltage that can be read by the voltmeter

In the wiring of houses, the fuse can be connected to the wire coloured

Which two of the following factors does not affect the electric resistance of wire?

Which of the following factors will increase the sensitivity of moving coil meter?

In order to prevent bar magnets from losing their strength, they are stored with keepers such that the two bars are placed with

The energy, E stored in an inductor of inductance L when current I passes through it is given by the equation

An electron moves with a speed of 2.0 x 10^6ms-1 in a straight line. Calculate the wave length of the electron wave. [mass of an electron = 9.1 x 10^-31 kg][Planck's constant = 6.6 x 10^-34Js]

An electric drill rated 400W is used to drill a hole in copper of mass 400g in 20s. Calculate the rise in temperature if all the heat produced is absorbed by the copper. [specific heat capacity of copper = 400Jkg-1K-1]

A solid of mass 0.5kg initially at 50degCelcius melts at 60degCelcius. Calculate the quantity of heat required to melt it completely. [specific heat capacity of the solid =2.0KJ kg-1K-1][Specific latent heat of fusion of solid =1.0 KJ kg-1]

A certain wave has a speed of 20ms-1. If the frequency of the wave is 0.25Hz, calculate the distance between successive crests of the wave

The ability of a wave to spread around corners is called

The following devices use plane mirrors in their operations, except

When an object is placed at the principal focus of a concave mirror, the location of the image formed is

A lens that is thicker at the middle and thinner at the edges is

A vertical string, suspended from a fixed point and having a small mass attached to the free end is set into oscillations. Which of the following statements about the system are correct? I. The potential energy of the mass is a minimum at the middle of the swing ii. Its kinetic energy is a maximum at the middle of the swing iii. The sum of the potential and kinetic energies is constant throughout the swing

A moving body of mass 25.0kg undergoes a uniform retardation of 20.0ms-2. Calculate the magnitude of the retardating force

Which of the following sources of energy is/are exhaustible? I. Solar ii. Fossil fuels iii. Tidal power

A machine is said to be a third class lever when the

A metal rod of density 7000 kg^m-3 and cross-sectional area of 0.001257m^2 has a mass of 1.76kg. Calculate its length

The pressure in a liquid

The property of a fluid that is used to determine its suitability as a lubricant is its

The area under a velocity-time graph represents

In the absence of gravitational force, the weight of the body is

Which of the following properties is not considered in choosing mercury as a thermometric liquid?

A stone of mass 300g is released from rest from the top of a building 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 hypsometer is used for determining

Which of the following equations shows how how the linear expansivity (α) and the cubic expansivity (γ) of a material are related?

A swimming pool is 2.1m deep. If it contains water of refractive index 1.3, calculate the apparent depth of the pool

An electric generator rated 12kw, 2kv distributes power through a caable of resistance 20ohms . Calculate the power loss in the cable

Two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period

A lead bullet of mass 0.05kg is fired with a velocity of 200ms−1 into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is

The main difference between echo and reverberation is that

The main difference between echo and reverberation is that

A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms^-1 from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is (take g = 10ms^-2)

The correct relationship between "G" and "g" in a gravitational field is given by the equation (Where the symbols have their usual meanings)

The capacitance of a parallel-plate capacitor

The capacitance of a parallel-plate capacitor

When the pointed end of an uncharged optical pin is brought near the cap cf a positively charged electroscope, it is observed that the gold

Which of the substances dos not conduct electricity

The unit of capacitance is

An ammeter with a full scale deflection of 10mA has an internal resistance 0.5Ω. Calculate the resistance of the shunt required to adapt it to read up to 3A

The resistivity, P, of a material of length l, cross-sectional area A, resistance R, is given by the equation

A wire of length 30cm is moved with a speed of 2ms-1 at right angles to a magnetic field of flux density 0.4T. Calculate the emf induced in the wire

Which of the following practices will lead to losses in electrical power transmission?

For photoelectric emission, the threshold frequency is the

Which of the following properties is not applicable to X-rays? They

Uranium-234 disintegrated to form Thorium-230 by emitting

Which device is used to determine the relative density of an acid?

A block of wood of density 0.6 gcm^-3, weighing 3.06N in air, floats freely in a liquid of density 0.9 gcm^-3. Calculate volume of the portion immersed (g = 10ms^-2)

A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained is attained, then

An inductor is connected to a 24V, 50Hz mains supply. If the current through the inductor is 1.5A, calculate the inductance of the inductor (π=22/7)

Which of the following statements about pressure in a liquid is correct?

A coil of inductance 0.12 H and resistance 4Ω, is connected across a 240V, 50Hz supply. Calculate the current through it. [π = 3.142]

The work function of a metal is 2.56 x 10^-19J. Calculate the frequency of a photon whose energy is required to eject from the metal an electron with kinetic energy of 3.0ev. [1 eV = 1.6 x 10^-19J, h = 6.6 x 10^-34Js]

The minimum energy required to cause photoelectric emission when the surface of a metal is irradiated with electromagnetic radiation of suitable frequency is called

Which of the following particles are termed nucleons in a neutral atom?

Which of the following statements about the use of radioisotopes is not correct? They are used to

Which of the following phenomena supports the theory that waves have a particle nature?

Which of the following statements about mass and weight are correct? I. Weight is the force of gravity on a body. ii. The mass of a body is the quantity of matter in the body. iii. The weight of a body is greatest at the equator. iv. The mass of a body is greatest at the poles

Materials that can be stretched and still return to their original forms when the stresses are removed are said be

The barometric reading at a place is 73.5m Hg. Calculate the pressure at a point 30m below the surface of water contained in a reservoir at the place. [g = ms^-2, density = 1.2 x 10^4kgm^-3, density of water = 1.0 x 10^3m-3]

An object floats in a fluid when it displaces its

The resultant force in a couple is

Which method of heat transfer that does not require a material medium?

The pressure applied to an enclosed fluid to one end id transmitted equally throughout the fluid and to the container walls. This statement is

In a nuclear fission process, the mass defect was 1.2 x 10^-5kg. Calculate the energy released. [speed of the light in vacuum = c = 3.0 x 10^8ms-1]

Red light travels faster than blue light when both of them pass through a glass prism because the