Physics Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below. 1, 2 and 3 only 1, 2, 3 and 4 3 and 4 only 4 only 1, 2 and 3 only 1, 2, 3 and 4 3 and 4 only 4 only ANSWER DOWNLOAD EXAMIANS APP
Physics Why are we able to hear short wave broadcasts better than long wave broadcasts ? By convention, short waves are meant for long distances, whereas long waves are reserved for short distances. Short waves are unaffected by atmospheric disturbances. Short waves are more energetic than long waves. Short wave broadcasts are made by nearby radio stations. By convention, short waves are meant for long distances, whereas long waves are reserved for short distances. Short waves are unaffected by atmospheric disturbances. Short waves are more energetic than long waves. Short wave broadcasts are made by nearby radio stations. ANSWER DOWNLOAD EXAMIANS APP
Physics The height of a geo-stationary satellite from the Earth's surface is approximately : 30,000 km 42,000 km None of these 36,000 km 30,000 km 42,000 km None of these 36,000 km ANSWER DOWNLOAD EXAMIANS APP
Physics The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be: 4 T 1 T 8 T 2 T 4 T 1 T 8 T 2 T ANSWER DOWNLOAD EXAMIANS APP
Physics At low temperature, Lead behaves as a : Conductor Superconductor Insulator Semi conductor Conductor Superconductor Insulator Semi conductor ANSWER DOWNLOAD EXAMIANS APP
Physics Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit visible light radio waves X-rays ultraviolet light visible light radio waves X-rays ultraviolet light ANSWER DOWNLOAD EXAMIANS APP
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