ABU Physics 2016/2017 Past Questions

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

A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the area stretched if the young modulus is 50N/m²

A.60m²
B.150m²
C.33.33m²
D.15m²

To determine the weight of an object you would

A.use a balance
B.use a spring balance
C.find the force necessary to give it a certain acceleration
D.use none of these methods
E.use any of these methods

A gas at pressure P N/, and temperature 27°C is heated t0 77°C at constant volume. The new pressure is

A.0.85PN/m
B.0.89PN/m
C.1.16PN/m
D.1.18PN/m
E.2.85PN/m

Two lamp rated 40w and 220w, each are connected in series. The total power dissipated in both lamp is

A.10w
B.20w
C.40w
D.80w
E.none

A magnet is moved through a coil of wire. The emf produced in the wire depends on the magnet is moved

A.the number of turns in the coil
B.the strength of the magnet
C.the speed t which the magnet is moved
D.all of the above
E.none of the above

A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is

A.4800cal
B.600cal
C.2400j
D.240kcal
E.600j

Two boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each the two tin cans. The physical principle employed is that sound travels.

A.mainly through air
B.fainter in stretching string
C.faster through gasses than in solids and liquids
D.with greater ease through a string than in air
E.none of the above

The hatch door of a submarine has an area of 0.5m². The specific gravity of sea water is 1.03. Assume that g = 10 m/s and neglect the atmospheric pressure. The force exerted by the sea water on the hatch door at a depth of 200m is

A.1.03 × 10⁵N
B.1.03 × 10⁵Nm²
C.2.6× 10³Nm²
D.2.06 × 10¹¹N
E.1.03 × 10³N

When equal weights of iron and water are subjected loan equal supply of heat. it is found that the piece of iron becomes much hotter than water after a short time because

A.The specific heat or iron is higher than water
B.iron is in solid form
C.water isin liquid form
D.the specific heat of water is higher than that of iron
E.the specific heat of iron in infinite

The speed of light is 3.0 × 10⁸m/s. Its speed in glass having a refractive index of 1.65 is

A.1.82 × 10⁸m/s
B.3 × 10⁸m/s
C.6.0 × 10⁸m/s
D.1.82 × 10⁸m/s