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Worksheetsphysics21 ss1
Total questions: 23
Worksheet time: 23mins
Which of the following quantities is not an example of force?
Mass
Tension
Weight
Friction
Formation of hydrogen bubbles at the copper plate of a primary cell is called?
polarization.
back e.m.f.
electrolysis.
local action.
Which of the following factors does not affect the rate of evaporation of a liquid?
temperature
volume
wind
surface area
A heat sensitive resistor made of a semiconductor is called?
thermometer
thermostat
thermistor
thermopile
Which of the following statements about the molecules of solids and liquids is correct? They both
have weak attraction.
have wide separations.
exhibit random motion.
exhibit vibratory motion.
A metallic sphere is heated from 27°C to 200°C Without change of state. Which of the following changes would have resulted from the heating?
No changes occur in its volume and density
Its volume increases and its density increases
Its volume increases and its density decreases
Its volume increases without a change in density
The acceleration of a moving object can be determined from the?
slope of its distance-time graph.
area under its distance-time graph.
slope of its velocity-time graph.
area under its velocity-time graph
The diagram illustrates the velocity- time graph of a body. Calculate the distance covered by the body during the motion.
15m
84m
72m
48m
Which of the following units is equivalent to the unit of electric current?
C s−1
W
J s−1
C
A ball is swung in a horizontal circle of center O with a constant speed. The acceleration is directed?
Away from O
Along the Circumference of the circle
Towards centre O
Along a tangent to the circle
A current of 2A passes through a wire of resistance 4Ω for 3 minutes. Calculate the energy lost.
960J
1440J
2880J
48J
An electric pressing iron is connected to the mains using an insulated wire. The wire becomes very hot. The heat generated in the wire can be minimized by replacing the wire with one of?
thinner insulation.
greater diameter.
smaller diameter.
thicker insulation.
In the diagram above, a bulb is lit by drawing 2.0A from 440V a.c. source. Calculate the cost of keeping the bulb on for two days at $0.40 per kilowatt-hour.
$16.90
$84.48
$1690.00
$8.48
A wire of cross-sectional area 2π x 10−8 m2 and resistivity 1.1 x 10−8 Ωm, has a resistance of 21 Ω. Calculate the length of the wire. [π=22/7]
180 m
140 m
120 m
240 m
Which of the following statements best describes the particles in a solid at room temperature? They are
far apart and moving randomly.
close together and vibrating.
close together and stationary.
close together and moving randomly.
A man weighing 200 N runs up a staircase in 5 s. If the height of the staircase is 9 m, calculate the power of the man.
1000 W
360 W
40 W
1800 W
A force of 10 N, acting continuously, increases the kinetic energy of an object from 20 J to 60 J. Find the distance moved by the object.
200m
40m
4m
400m
An electric circuit consists of a resistor. a battery and a key. If the voltage of the battery is increased, there would be an increase in the?
current and resistance only.
current resistance and temperature.
current and temperature only.
resistance and temperature only
A stone is thrown horizontally with initial velocity 15 m/s from a tower 20 m high. How long does it take to reach the ground? [g= 10m/s2]
2s
4s
5s
1s
Which of the following statements about distance and displacement is not correct?
Displacement is a vector quantity.
Distance has dimension
Displacement is measured in meters.
Distance is a vector quantity
According to Pascal's principle, the pressure in a fluid is always?
dependent on density of the fluid.
distributed partially in all directions.
transmitted equally in all directions.
increasing with height.
Which of the following set of quantities have members which are all vectors?
Pressure, energy and force
Force, displacement and momentum
Distance, acceleration and work
Density, volume and weight
Which of the following factors is not among that determines the resistance of a wire?
mass
cross-sectional area
length
material
