UNIZIK Physics 2012/2013 Day 1 Past Questions

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

A temperature of 20°C is the same as

A.36°F
B.68°F
C.11.1°F
D.43.1°F
E.25°F

A guitar string is 75cm long. The wavelength of the fundamental note is

A.75cm
B.150cm
C.37.5cm
D.112.5cm
E.50cm

A man standing between two parallel mirrors in a barber's shop will see the following number of his own image

A.Eight
B.Two
C.Four
D.One
E.Infinite

Which of the following electromagnetic waves has the shortest wavelength?

A.Radio waves
B.X-rays
C.Infra-red
D.Blue light
E.Ultraviolet

In an electrolysis experiment, a cathode of mass 5g is found to weight 5.01g after a current of 5A flows for 5 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
E.0.00001 g/C

The activity of a radioactive substance depends on

A.temperature and purity
B.temperature and age
C.purity and age
D.age, purity and temperature
E.none of the above

The resistance of an open series circuit is

A.zero
B.half the normal resistance of the circuit
C.double the normal resistance of the circuit
D.one
E.infinite

The resistance of a 240V, 60 watts electric filament bulb is

A.0.25 ohms
B.480 ohms
C.60 ohms
D.240 ohms
E.960 ohms

A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is

A.5 volts
B.10 volts
C.15 volts
D.20 volts
E.25 volts

A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is

A.3.3cm
B.6.5cm
C.7.5cm
D.10.8cm
E.15.0cm