Which question paper type of physics is given to you?
A carpenter on top of a roof 20.0 m high dropped a hammer of mass 1.5 kg and it fell freely to the ground. The kinetic energy of the hammer just before hitting the ground is
(g 10 ms-2)
Two balls X and Y weighing 5 g and 50 kg respectively were thrown up vertically at the same time with a velocity of 100ms-1. How will their positions be one second later?
X will be 500m ahead of Y
X and Y will both be 500m from the point of throw
X and Y will be 500m from each other
Y will be 500m ahead of X
A man standing on a lift that is descending does not feel any weight because
There is no reaction from the floor of the lift
There is no gravitational pull on the man in the lift
The inside of the lift is airtight
The lift is in vacuum
The diagram below shows two vectors at right angles to each other. The value of the resultant vector is
An object of mass 2 kg moves with a velocity of 10 ms-1 round a circle of radius 4m. Calculate the centripetal force on the object
If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
The diagrams below show the positions of a cone. The position which can be described as neutral equilibrium is represented as
Y and Z
Y and X
If a tube of small radius opened at both ends is placed in a liquid, the liquid will
fall below the liquid level if the liquid does not wet the glass
rise above the liquid level if the liquid does not wet the glass
remain at the same level irrespective of whether the liquid wets the glass or not
fall below the liquid level if the liquid wets the glass
I. Density of the liquid
II. Depth below the surface of the liquid
III. Surface area of the liquid
In which of the statements above will pressure be dependent?
I, II and III
I and III only
I and II only
II and III only
I. High thermal capacity
II. High sensitivity
III. Easy readability
IV. Accuracy over a wide range of temperatures
From the statements above, the qualities of a good thermometer are
I, III and IV
II, III and IV
I and II
I, II, III and IV
A machine is used to lift a load of 20N through a height of 10m. If the efficiency of the machine is 40%, how much work is done?
Which of the following could be effectively used to reduce friction?
A copper wire was subjected to a tensile stress of . Calculate the tensile strain of the wire.
(Young modulus = )
An object weighs 22kg in water and 30kg in air. What is the upthrust exerted by the liquid on the object?
A block of aluminium is heated electrically by a 30W heater. If the temperature rises by 100C in 5 minutes, the heat capacity of the aluminium is
Perfect emitter or absorber of radiant energy is a
The phenomenon that shows that increase in pressure lowers the melting point can be observed in
If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys
Steam burn is more severe than that of boiling water because
water boils at a higher temperature
steam burn is dependent on relative humidity
steam burn is independent of relative humidity
steam possesses greater heat energy per unit mass
Which of the following types of waves needs a medium for prepration?
X - rays
The ground is always cold at night because the
sun no longer shines at night
atmosphere reflects the sun's energy at night
atmosphere absorbs the sun's energy at night
earth radiates heat to the atmosphere at night
A metal of volume 40cm3 is heated from 300C to 900C, the increase in volume is
(Linear expansivity of the metal = )
I. Change of state
Which of the processes above can be explained using the kinetic theory?
I, III and IV
I, II and IV
I, II, III and IV
I, II and III
When the human eye loses its power of accomodation, the defect is known as
A length of wire has a frequency of 255Hz when stretched by a force of 225N. If the force increases to 324N, what is the new frequency of vibration
A certain far-sighted person cannot see objects that are closer to the eye than 50 cm clearly. Determine the power of the converging lens which will enable him to see at 25cm
Which of the following electromagnetic waves has the highest frequency?
Infrared - rays
X - rays
Ultra - violet rays
When a red rose flower is observed in blue light, what colour does the observer see?
The eclipse of the sun occurs when the
moon is not completely hidden in the earth's shadow
moon's umbra falls on some part of the earth
moon is between the sun and the earth
earth is between the sun and the moon
A cannon is fired from X. After how long is the sound heard at a town Y 4.95km away?
(Velocity of sound in air = 330ms-1)
An image in a convex lens is upright and magnified 3 times. If the focal length of the lens is 15cm, what is the object distance?
The capacitance of a parallel plate capacitor is in air and in the presence of a dielectric. What is the dielectric constant?
In the circuit below, three resistors, are connected in parallel and a 12V battery is connected across the combination. The current flowing through the resistor is
If the charge of electricity per kWh is #4, what is the cost of operating an electrical appliance rated 2.50V, 2A for 6 hours ?
The correct expression for the potential at a point, distance r from a chaarge q, in an electric field is
Three similar cells each of e.m.f 2V and internal resistance are connected in parallel, the total e.m.f and total internal resistance are respectively
In homes, electrical appliances and lamps are connected in parallel because
less current will be used
less voltage will be used
parallel connection does not heat up the wires
series connection uses high voltage
Two resistors and are arranged first in series and later in parallel to a 24 V source. The ratio of total power dissipated in the series and parallel arrangements respectively is
Which of the following will be applied when a metal Y is used to electoplate another metal X in electrolysis ?
Y is the cathode and X is the anode
Y is the anode and very high current is used
X is the anode and very high current is used
X is the anode and Y is the cathode
A radioactive isotope has a decay constant of 10-5s-1. Calculate its half life
Which of the following is a property of steel?
It can be used for making permanent magnets
It can easily be magnetized and demagnetized
It cannot retain its magnetism longer than iron
It can be used for making temporary magnets
If the threshold frequency for tungsten is , what is its work function ?
(h = ***)
In an a.c circuit, the ratio of r.m.s value to peak value of current is
Two inductors of inductances 4H and 8H are arranged in series and a current of 10A is passed through them. What is the energy stored in them?
Under which of the following condition do gases conduct electricity ?
High pressure and low p.d
High pressure and high p.d
Low pressure and low p.d
Low pressuer and high p.d
In measuring high frequency a.c, the instrument used is the
moving iron ammeter
hot wire ammeter
moving coil ammeter
The bond between silicon and germanium is
Which of the following materials has an increase in resistance with temperature ?
The electrical properties of germanium can be altered drastically by the addition of impurities. This process is referred to as