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Physics

Heat

Easy

Question

$T h e space p h y s i c a l space s i z e s space o f space t h e space t r a n s m i t t e r space a n d space r e c e i v e r space a n t e n n a space i n space a space c o m m u n i c a t i o n space s y s t e m space a r e space colon space$

$i n v e r s e l y p r o p o r t i o n a l t o m o d u l a t i o n f r e q u e n c y$
$p r o p o r t i o n a l t o c a r r i e r f r e q u e n c y$
$i n v e r s e l y p r o p o r t i o n a l t o c a r r i e r f r e q u e n c y$
$i n d e p e n d e n t o f b o t h c a r r i e r a n d m o d u l a t i o n f r e q u e n c y$

The correct answer is: $i n v e r s e l y space p r o p o r t i o n a l space t o space c a r r i e r space f r e q u e n c y space$

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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.

What kind of images does a convex lens not form?

What kind of images does a convex lens not form?

parallel

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 ____.

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 ____.

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.

parallel

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?

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.

Concave lenses are also called ____ lenses.

Concave lenses are also called ____ lenses.

parallel

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 .

A light ray bends on entering a .

A light ray bends on entering a .

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.

parallel

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