Tag: science & technology

There's a factual issue here. INS Chakra was India's first nuclear submarine, but it was a leased Russian submarine (Akula-class), not indigenous. INS Arihant is India's first indigenous nuclear submarine. However, the question asks for 'first nuclear submarine' without specifying indigenous, so INS Chakra is technically correct. INS Viraat was an aircraft carrier, INS Delhi is a destroyer.

Dr. Rangabashyam, a noted Indian medical professional, was awarded inclusion in the Wall of Honour at the Royal Society of Medicine. C.N. Rao is a famous scientist but not specifically associated with this medical honor. Kadambini Ganguli and Anandabai Joshi were early Indian female doctors but not recent recipients of this specific honor.

Lakshya is India's pilotless target aircraft used for military training. Nishant is a UAV but not primarily pilotless, Prithvi is a ballistic missile, and Agni is a series of nuclear-capable missiles - none of which are pilotless aircraft.

K. Santhanam, a scientist associated with the Pokhran II tests, publicly called the thermonuclear test a 'fizzle'. Abdul Kalam was the project head who defended the tests, while the others listed were not directly involved in the controversy.

H and N stand for Haemagglutinin and Neuraminidase, which are surface proteins on influenza viruses. H5N1 causes avian flu in birds, not normal flu. The hypothalamus/neurotransmitter options are biologically incorrect.

Bluetooth technology was first developed by Ericsson Mobile Communications in 1994. The name comes from the 10th century Danish King Harald Blatand (Bluetooth), who unified Denmark and Norway. Option A is correct.

Wireless technology indeed encompasses a broad spectrum of applications including traditional radio and TV broadcasting, mobile phones, Bluetooth, and wireless LAN networks. This comprehensive range makes 'True' the correct answer.

In f-stop notation, a smaller denominator number means a larger aperture and more light. Among these fractions, 1/8 is the largest value, allowing the most light. 1/32 is the smallest (least light), with 1/16 and 1/12 being intermediate values. This counterintuitive concept often confuses photography students.

Shutter speed is expressed as fractions of a second. A larger denominator means a shorter exposure time, making the shutter faster. 1/250th second exposes the sensor for less time than 1/125th, 1/25th, or 1/8th second, making it the fastest shutter speed among the options.