What happens if you use two household cordless phones at the same time? Explain with appropriate reasons.
What will be an ideal response?
A cordless phone has two essential components: a base and a handset. The base converts the incoming electrical signal (in case of incoming call) to FM radio signal and broadcasts the signal, which is received by the handset. The base and handset work in duplex frequency mode. In 1998, FCC (Federal Communications Commission) opened up 2:4 GHz range (ISM band) for cordless phone use. Now, digital spread spectrum (DSS) is used in each cordless phone where information between the receiver and the base are spread over several frequencies. If we have 2 cordless phones at the same time then, it may happen that at a particular instant both the phones are using the same frequency channel and hence may result in a collision. But since the band is very large and the frequency hopping sequence may utilize different hopping schemes, the possibility is lower.
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Answer the following statement(s) true (T) or false (F)
1. The starting of fairly large DC motors requires that current be increased gradually and at the same time resistance must be inserted in series with the armature of the motor. 2. The current taken by the armature will be abnormally high unless the DC supply is increased gradually. 3. The counter emf developed by a motor is proportional to the speed of the motor unless the field is constant. 4. The total starting current is equal to the armature current plus the field current of 1 ampere. 5. Resistors may be rated in watts.
3 x (10 - 3 1/3) = ____.
A. 10 B. 15 C. 20 D. 30
Define climatic conditions and explain how they affect food
What will be an ideal response?
Lapping is the process of using a grinding paste to produce a fine finish on the teeth of the two gears that will be in full contact with each other
Answer the following statement true (T) or false (F)