Physics - Study Mode

[#1196] If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?
Correct Answer

(A) Concave

Explanation

Solution: If objects appear enlarged and inverted in a rear view mirror, then concave mirror is used.

[#1197] Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
Correct Answer

(C) visible light

Explanation

Solution: Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit visible light.

[#1198] Out of the following pairs, which one does not have identical dimension?
Correct Answer

(A) Moment of inertia and moment of a force

Explanation

Solution: Moment of inertia and moment of a force does not have identical dimension.

[#1199] Mercury is commonly used as a thermometric fluid rather than water because
Correct Answer

(C) mercury has greater visibility than water

Explanation

Solution: Mercury has greater visibility than water.

[#1200] Optical fibre works on the
Correct Answer

(B) total internal reflection

Explanation

Solution: The optical fibre is a device which works on the principle of total internal reflection by which light signals can be transmitted from one place to another with a negligible loss of energy. Characteristics of Optical Fibre: It has a large bandwidth.