- ARadio Waves
- BGamma Waves
- CX-Rays
- DInfrared Waves
Explanation:
Infrared waves are heat radiations also known as heatwaves. These waves are produced by hot bodies and molecules. They do heating because water molecules present in most of the materials readily absorb infrared waves and their thermal motion increases, so they heat themselves and also heat their surroundings.
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The tangent galvanometer, when connected in series with a standard resistance can be used as
|
(a) An ammeter |
(b) A voltmeter |
|
(c) A wattmeter |
(d) Both an ammeter and a voltmeter |
Two charges each of 1 coulomb are at a distance 1 km apart, the force between them is
|
(a) |
(b) 9 |
|
(c) |
(d) |

A triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is
|
(a) Zero |
(b) IBl |
(c) |
(d) |