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WorksheetsSA-2 Physics Revision
Total questions: 20
Worksheet time: 13mins
Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively
plane mirror and convex mirror
plane mirror and concave mirror
concave mirror and convex mirror
None of these
Changing of right side to left is called …………………..
(a)
You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either
concave mirror or convex lens
concave mirror or convex mirror
concave mirror or concave lens
concave lens or convex lens
Angle between incident ray and reflected ray is double that of the angle of incidence.
True
False
A simple pendulum takes 32s to complete 20 oscillations, what is the time period of the pendulum?
1.8seconds
1 minute
1.5 seconds
1.6 seconds
Which of the following are not correct?
(i) The basic unit of time is second.
(ii) Every object moves with a constant speed.
(iii) Distances between two cities are measured in kilometers.
(iv) The time period of a given pendulum is not constant.
(v) The speed of a train is expressed in m/h
(i), (ii), (iv)
None of the above
(ii), (iv), (v)
(ii)and (iv) only
Which of the following relations is correct?
Speed = Distance/Time
Speed – Time/Distance
Speed = Distance× Time
Study the graph given above . What can be concluded about the speed in the above graph?
It increases first and then becomes constant but not zero.
It goes on increasing
It decreases first and then becomes zero
When an electric current passes through a solenoid, it acts as a/an
Insulater
electric bell
Resister
bar magnet
The strength of the magnetic field due to a solenoid can be increased by
decreasing the current strength in the solenoid
increasing the number of turns in the solenoid
by winding solenoid around a plastic rod
All of the above
Compact fluorescent lamps (CFLs) are considered better than ordinary electric bulbs because?
a)It reduces wastage
b) It can be fixed in an ordinary bulb holder
c)None of these
d)Both a and b
e) only a
The space around a magnet where its influence can be experienced is called the (a)
SI unit of speed is (a)
An instrument showing the time by the shadow of a pointer cast by the sun on to a graduated plate is called (a)
What are the points that should be kept in mind while choosing scale for drawing graph?
The difference between the highest and the lowest values of each quantity.
To use the minimum part of the paper on which graph is to be drawn.
The intermediate values of each quantity to mark the values on the graph.
Distance-time graphs gives information about the nature of the motion of an object like uniform or uniform motion. Motion of an object can be represented by its distance-time graphs.
True
false
I am a special type of clock or watch which has an electric circuit with one or more cells
Who am I?
(a)
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.
Speed of the car in km/m
= .75 Km/m
Speed of the car in Km/h
= 45 Km/h
Speed of the car in km/m
= 75 Km/m
Speed of the car in Km/h
= 4.5 Km/h
Speed of the car in km/h
= 75Km/h
Speed of the car in Km/m
= 45 Km/m
The mirror used in scooters, cars etc. to see vehicle coming from back is concave mirror.
true
false
Mirror is polished or a shinning non-reflecting surface
true
false
