Q1. A radio station is to be set up in a remote village without any electrical power. The following options are available :
A. Laying of transmission lines from power station to the village
B. Installing diesel generators
C. Using rechargeable batteries
D. Using solar panel/stills
Of these the last method is an example of
(a) Appropriate technology
(b) Ultimate technology
(c) Redundant technology
(d) Obsolete technology
(UPSC Prelims 1983)
Answer: (a) Appropriate technology
Explanation: Solar panels/stills represent appropriate technology for remote areas, offering sustainable, low-cost, and locally adaptable solutions. They require minimal infrastructure, making them ideal for off-grid applications.
Q2. The internal antenna of a transistor set is made of
(a) Iron
(b) Ferro-chrome
(c) Copper
(d) Alnico
(UPSC Prelims 1983)
Answer: (d) Alnico
Explanation: Alnico, an alloy of aluminium, nickel, and cobalt, is used in transistor antennas due to its strong magnetic properties and stability, making it ideal for signal reception.