India: Science ...

Consider the following statements:
1. In cordless telephone, it needs a main electricity to supply power to the base station.
2. The cordless handset is powered by a rechargeable battery which is charged when the handset sits in its cradle.
Which of the statements given above is/are correct?

Consider the following statements:
1. Bluetooth creates Personal Area Networks (PANs) with high levels of security.
2. Bluetooth uses radio waves to transmit data and information between two terminals wirelessly.
Which of the statements given above is/are correct?

Which one of the following is the fourth generation mobile service according to International Mobile Telecommunication Union?

Which one of the following statements is correct?

Which of the following statements is correct about the gamma-rays?

Which one of the following is a family of technologies that provides digital data transmission over the wires of a local telephone network?

Consider the following statements:
1. LTE supports both Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD).
2. India has started the implementation of LTE mobile technology in 2011 itself. 

In which one of the following ranges of frequency, the radio wave is used to transmit signals from the wireless handset to the base station?

Robert Webster is known for his work associated with which one of the following?

Consider the following statements:
1. Symmetric Digital Subscriber Line (SDSL) is a collection of internet access technologies that offer symmetric upstream and downstream bandwidth.
2. Asymmetric Digital Subscriber Line (ADSL) provides greater bandwidth toward downstream than upstream.
Which of the statements given above is/are correct?