Which physics Question Paper Type is given to you?
Two cars moving in the same direction have speeds of 100 kmh-1 and 130 kmh-1. What is the velocity of the faster car as measured by an observer in the slower car?
The diagram below shows a velocity-time graph. The statement that is true about this motion is that, the car
decelerates between points F and H
accelerates between points F and G
has a constant speed between points E and F
has no acceleration between point F and G
A stone and a feather are dropped from the same height above the earth surface. Ignoring air resistance, which of the following is correct?
The stone and the feather will both reach the ground at the same time
The stone will reach the ground first
The feather will reach the ground first
The feather will be blown away by the wind while the stone will drop steadily
A car moves with an initial velocity of 25 ms-1 and reaches a velocity of 45 ms-1 in 10s. What is the acceleration of the car?
An object is weighted at different locations on the earth. What will be the right observation?
Both the mass and weight vary
The weight is constant while the mass varies
The mass is constant while the weight varies
Both the mass and weight are constant
The diagram below represents balls in an undulating surface. Which of the following options represents positions of stable equilibrium?
II, V and VIII
I, IV and VII
III, VI and IX
III, IV and VIII
A bob of weight 0.1N hangs from a massless string of length 50cm. A variable horizontal force which increases from zero is applied to pull the bob until the string makes an angle of 600 with the vertical. The work done is
The surfaces of conveyor belts are made rough so as to
prevent the load from slipping
make them stronger
enable them to carry more load
protect them while carrying loads
A machine of velocity ratio 6 requres an effort of 400 N to raise a load of 800 N through 1m. Find the efficiency of the machine.
If a wire 30cm long is extended to 30.5cm by a force 300N. Find the strain energy of the wire:
In a hydraulic press, the pump piston exerts a pressure of 100 Pa on the liquid. What force is exerted in the second piston of cross-sectional area 3m2
The accurate measurement of the relative density of a substance in its powdered form is done with a beam balance and
an eureka can
a density bottle
A hydrometer is an instrument used in measuring
density of liquid
relative density of a liquid
relative humidity of a liquid
vapour pressure of a liquid
One special advantage of alcohol over mercury as a thermometric liquid is its
low freezing point
low boiling point
high specific heat capacity
Two metals P and Q of lengths l1 and l2 are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their lengths is 3:4. What is the ratio of increase in lengths of P to Q?
The density of a certain oil on frying becomes 0.4 kgm-3 with a volume of 20 m-3. What will be its initial volume when its initial density is 0.8 kgm-3 assuming no loss of oil due to spillage?
Heat is radiated by all hot objects in the form of
If a container is filled with ice to the brim, what happens to the level of water when the ice completely melts?
The water in the glass overflows
The level of water drops
The level of water remains unchanged
The level of water goes up
The small droplet of water that forms on the grass in the early hours of the morning is
A vapour is said to be saturated when
a dynamic equilibrium exists such that more molecules return to the liquid than are leaving it
the vapour pressure is atmospheric
the temperature of the vapour varies
a dynamic equilibrium exists between liquid, molecules and the vapour molecules
The pressure of one mole of an ideal gas of volume 10-2m3 at a temperature of 270C is
(Molar gas constant = 8.3 J mol-1K-1)
Which of the following has no effect on radiation ?
nature of the surface
The wavelength of a wave travelling with a velocity of 420 ms-1 is 42m. What is its period?
The sound of an electric bell dies slowly when air is slowly pumped out from a bottle because
sound cannot pass through the bottle
sound can pass through a vacuum
sound needs a material medium
the wavelength of sound becomes greater in the bottle
During a thunderstorm, the sound is heard over a long time. This phenomenon is referred to as
refraction of sound
diffraction of sound
The velocity of sound in air at 160C is 340ms-1. What will it be when the pressure is doubled and its temperature raised to 1270C?
In comparing the camera and the human eye, the film of the camera functions as the
An object 4cm high is placed 15cm from a concave mirror of focal length 5cm. The size of the image is
An object is embedded in a block of ice, 10cm below the plane surface. If the refractive index of the ice is 1.50, the apparent depth of the object below the surface is
Which of the following is used for the correction of short-sightedness?
Dispersion occurs when white light passes through a glass prism because of the
different speeds of the colours in the glass
high density of the glass
defects in the glass
different hidden colours in the glass
When a positively charged rod is brought nearer the cap of a positively charged electroscope, the leaves divergence will
Three capacitors of capacitance, , and are connected in parallel and a p.d of 6V is maintained across each capacitor, the total energy stored is
A cell of emv 12V and internal resistance is connected to an external resistor of resistance . Find the current flow
The diagram below shows a balanced metre bridge, the value of x is
Three resistors connected in parallel have a potential difference of 16V applied across them. What is the total current in the circuit?
In the diagram below, a 200W bulb is lighted by a 240V a.c mains supply. If 1kWh is sold at #40, the cost of keeping the bulb lighted for a day is
Power supply is transmitted at a very high voltage and low current in order to
increase the power supply
prevent overheating the coil
make it travel fast
make it pass through the transformers
In the diagram below, if the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be
north and south
south and south
north and north
south and north
A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5V. If a series resistance of is used for the conversion, the resistance of the galvanometer is
Two inductors of inductances 5 mH and 15 mH are connected in series and a current of 5 A flows through them. The total energy stored in the inductors is
In alternating current circuit at resonance, the angle of lead or lag is
In Faraday's law of electrolysis, a graph of mass deposited against the quantity of electricity is plotted. The slope of the graph gives
the electrochemical equivalent
the charge released
the current flowing
the energy released
In a discharge tube, most of the gas is pumped out so that electricity is conducted at
The radioisotope decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic numbers of the resulting daughter element?
91 and 227
92 and 238
227 and 91
215 and 88
The ground state energy for a hydrogen atom is . If an electron drops from zero energy to ground state, calculate the frequency of the emitted radiation.
Transistors are used for the
conversion of a.c to d.c
conversion of d.c to a.c
amplification of signals
rectification of signals
A typical transistor characteristics is represented as
Which of the following is a pure semiconductor?