Physics
Motion
Easy
Question
Which of the following is a one dimensional motion
- Landing of an aircraft
- Earth revolving around the sun
- Motion of wheels of a moving trains
- Train running on a straight track
The correct answer is: Train running on a straight track
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A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is
A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is
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A car travels from A to B at a speed of 20km/hr and returns at a speed of 30km/hr . The average speed of the car for the whole journey is
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A lens always forms a virtual, upright, and diminished image of an object placed in front of it. It is a ____ lens.
A lens always forms a virtual, upright, and diminished image of an object placed in front of it. It is a ____ lens.
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What kind of images does a convex lens not form?
What kind of images does a convex lens not form?
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The lens of a pair of spectacles used by a person is thinner in the middle and thicker towards the edges. The lens used in the spectacles is ____.
The lens of a pair of spectacles used by a person is thinner in the middle and thicker towards the edges. The lens used in the spectacles is ____.
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A concave lens forms a virtual, upright, and diminished image of an object ____.
A concave lens forms a virtual, upright, and diminished image of an object ____.
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A lens can only form a virtual, upright, and diminished images irrespective of the distance between the lens and the object. It is a ____ lens.
A lens can only form a virtual, upright, and diminished images irrespective of the distance between the lens and the object. It is a ____ lens.
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In the setup shown in the picture below, the sun rays are focused on a paper by a magnifying glass, which results in the paper catching fire. If the magnifying glass was replaced by a concave lens, the paper does not catch fire. Why?
In the setup shown in the picture below, the sun rays are focused on a paper by a magnifying glass, which results in the paper catching fire. If the magnifying glass was replaced by a concave lens, the paper does not catch fire. Why?
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The angle between the incident ray and the emergent ray is not equal to ____ degrees when the light gets refracted through a spherical lens.
The angle between the incident ray and the emergent ray is not equal to ____ degrees when the light gets refracted through a spherical lens.
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Concave lenses are also called ____ lenses.
Concave lenses are also called ____ lenses.
PhysicsGrade-7
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When a parallel beam of light falls on a surface of a concave lens it ____ the rays of light in such a way that they appear to originate from a point called ____.
When a parallel beam of light falls on a surface of a concave lens it ____ the rays of light in such a way that they appear to originate from a point called ____.
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A light ray bends ____ on entering a ____.
A light ray bends ____ on entering a ____.
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The eye lens of a human eye is thicker in the middle as compared to the edges. It is a ___ lens.
The eye lens of a human eye is thicker in the middle as compared to the edges. It is a ___ lens.
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A magnifying glass is placed in the path of sun rays, and a sharp point-sized image of the Sun is obtained on a paper placed on the other side of the magnifying glass. This image is formed at the ___ of the glass.
A magnifying glass is placed in the path of sun rays, and a sharp point-sized image of the Sun is obtained on a paper placed on the other side of the magnifying glass. This image is formed at the ___ of the glass.
PhysicsGrade-7
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A lens can always form both real and inverted and virtual and upright images of an object placed in front of it. It is a ____ lens.
A lens can always form both real and inverted and virtual and upright images of an object placed in front of it. It is a ____ lens.
PhysicsGrade-7
