FUTA Physics 2011/2012 Past Questions

Practice each question, then open it to see the full details.

A man has five 40W electric light bulbs, six 60W bulbs and two 100W bulbs in his house. If all the points are on for five hours daily and PHCN charges 12k per unit, what is his bill for 30 days?

A.N13.68
B.N0.46
C.N2.74
D.none of the above

In a resonance tube experiment, the first resonance position is 16cm when the velocity of sound in air is 327.68m/s. Find the frequency of the tuning fork used.

A.512kHz
B.256Hz
C.128H
D.512Hz

Half-life of a radioactive substance is:

A.the average lifetime ofthe substance
B.the time it takes the substance to decay to half of its original quantity
C.the time it takes the activity of the substance to decay to half of its original value
D.all of the above

The headlamp bulb of a motorcar is rated 60W. 12V, Calculate the resistance of its filament.

A.0.2 W
B.5 W
C.2.4 W
D.2 W

In an electrolysis experiment, a cathode of mass 4.5g weighs 4.52g after a current of 4.5A flows for 1 hour. The electrochemical equivalent of the deposited substance is:

A.0.00444g/C
B.0.00741 g/C
C.0.00074g/C
D.0.00000123g/C

An object falls freely under gravity from a given height. At halfway point. its kinetic energy is:

A.exactly half of its initial potential energy
B.exactly half of its kinetic energy
C.exactly half of its final potential energy
D.zero

The silvered walls of a vacuum flask are used to prevent:

A.heat loss due to opacity
B.heat loss due to radiation
C.heat loss due to convection
D.heat loss due to conduction

The law of universal gravitation states that:

A.All bodies on the surface of the earth are attracted towards the centre of the universe
B.Any two bodies attract each with a force which is directly proportional to product of their masses and inversely proportional to the square of the distance between them
C.All bodies attract each other with force which is directly proportional to product of their masses and inversely proportional to the square of the distance between them
D.Any two bodies attract each other with a force which is the product of their masses and inversely proportional to the distance between them.

The nucleus of atom consists of:

A.protons and neutrons
B.protons and electrons
C.electrons and neutrons
D.electrons. protons and neutrons

A certain quantity of heat increases the temperature of 185g of water from 10°C to 20°C and increases the temperature of an equal volume of 140g of oil from 7°C to 18°C. The ratio of the specific heat of the oil is to that of water is:

A.0.83
B.1.20
C.1.07
D.0.93

The motion of the pendulum bob is:

A.rotational
B.circulatory
C.Oscillatory
D.none of the above

Which of the following is not one of the factors that affect the capacitance of a Capacitor?

A.Temperature
B.area of plates
C.distance between the plate
D.dielectric between the plates

Which of the following statements is true of gamma-rays?

A.they are deflected by electric field
B.they ionize intensely
C.they carry no electric charge
D.they originate outside the nucleus of the atom

The virtual image formed of an object placed 10cm from a convex lens is 2. Find the focal length of the lens.

A.7.5cm
B.15cm
C.30cm
D.10cm

A milliammeter of resistance 2.5 and full scale deflection of 50mA is to be used to measure a potential difference of 50V. What is the resistance of the multiplier?

A.9.75W
B.997.5W
C.9975W
D.9.98W

The ice and steam points of a mercury- in-glass thermometer of centrigade scale and of uniform bore correspond respectively to 3cm and 23cm lengths of the mercury thread. What is the temperature when the length of mercury thread is 12cm?

A.40°C
B.60°C
C.75°C
D.47.39°C

When a ray of light passes from glass to air, it is:

A.bent towards the normal
B.away from the normal
C.not deviated
D.spread out in a pure spectrum

What is the resistance of the filament of an electric lamp rated 220V, 100W?

A.0.45W
B.2.2W
C.484W
D.440W

Pressure cooker cooks faster because

A.the inside is polished
B.inside the cooker, the boiling point of water is raised
C.inside the cooker, the boiling point of water is lowered
D.inside the cooker, the pressure of water is raised

A gasoline generator is used to power ten 40W lamps, five 60W lamps and a musician's 100W amplifying system. If the generator runs for 5 hours, the energy used is

A.1.7kWh
B.8.5kWh
C.1.0kWh
D.none of the above