Physics: Motion, Measurement and Light
Motion and measurement, Light
Questions
Which of the following is not an arbitrary unit of measurement?
- Hand span
- Foot length
- A ruler
- Arms length
- Finger length
Which of the following does not show periodic type of motion?
- Wheel of cycle
- Sewing machine's needle
- Pendulum of a big clock
- A child swinging
- None of these
Which of the following types of motion is shown by a truck moving on a bend?
- Linear
- Curvilinear
- Rotation
- Periodic
- Circular
Which of the following objects is/are known as luminous object(s)?
(a) Sun
(b) Moon
(c) Bulb
(d) Glass
(e) Mirror
- Both a and c
- Both a and b
- Both d and e
- Both c and e
- Both b and e
Which is false regarding the correct steps of measurement?
- The scale should be placed along the length of the object to be measured.
- The zero mark of the scale should be taken as the beginning point.
- Marking of the scale should be clear and visible.
- The eye position should be just above the point to be measured.
- None of these
Sri is holding a mirror in a complete dark room. What kind of image will he see?
- Dark coloured image
- Inverse image
- Diminished image
- Exactly same image
- None of these
When an object is close to the source of light, the shadow formed will _____________.
- be long and at the back of object
- be short and at the back of object
- not be formed
- be long and on the same side
- be short and on the same side
Which of the following objects will cast a clear dark shadow?
- A glass container
- Translucent door
- Wooden chair
- Eye lens
- All of these
Manohar could see a clear image of the tree in the water, as the water was still. Which option explains it correctly?
- It is because of reflection.
- It is because of refraction.
- It is because of shadow formed in water.
- It is because of transparency of water.
- None of these
Parallax error during measurement is due to ___________.
- incorrect object position
- incorrect eye position
- incorrect ruler position
- not proper light
- all of these
In a pinhole camera, one can get _____________ image.
- inverted and virtual
- erect and virtual
- inverted and real
- erect and real
- enlarged
An object which produces light by itself is ___________.
- non-luminous object
- luminous object
- transparent object
- translucent object
- opaque object
On a stormy night, Ramesh could see a faint image of tree branches through the window pane. What kind of a window pane does his room have?
- Transparent
- Opaque
- Translucent
- Dirty glass
- Pane with reflecting surface
Which of the following statements is/are true?
(a) The smaller the angle of incidence, the larger is the shadow formed.
(b) The nearer the source of light, the smaller is the shadow formed.
(c) When source of light is on top of a gas cylinder, a circular shadow will be formed.
- Only c
- Only b
- Only a
- Both a and c
- All are true