Science and Technology For UPSC and Other State Services Examinations>Chapter 7 - Electromagnetic Radiation>PERFECTING PAST PRELIMS>Q 5

MEDIUM

Bihar Police SI Prelims

IMPORTANT

Earn 100

Consider the following:

$1$ . Bluetooth device

$2$ . Cordless phone

$3$ . Microwave oven

$4$ . Wi-Fi device

Which of the above can operate between $2 - 4$ and $2 - 5$ GHz range of radio frequency band?

50% studentsanswered this correctly

Important Questions on Electromagnetic Radiation

HARD

Bihar Police SI Prelims

IMPORTANT

Science and Technology For UPSC and Other State Services Examinations>Chapter 7 - Electromagnetic Radiation>PERFECTING PAST PRELIMS>Q 6

If a potato is placed on a pure paper plate that is white and unprinted and put in a microwave oven, the potato heats up but, the paper plate does not. This is because:

MEDIUM

Bihar Police SI Prelims

IMPORTANT

Science and Technology For UPSC and Other State Services Examinations>Chapter 7 - Electromagnetic Radiation>PERFECTING PAST PRELIMS>Q 7

The increasing amount of carbon dioxide in the air is slowly rising the temperature of the atmosphere because it absorbs: