241. Which of the following has the lowest frequency?

1. Visible light
2. Gamma rays
3. X-rays
4. Ultra violet rays

Option “1” is correct.
Visible light has the lowest frequency among the following electromagnetic radiations.
242. Who discovered theory of relativity?

1. Isaac Newton
2. Albert Einstein
3. Neil Bohr
4. Michael Faraday

Option “2” is correct.
The Theory of relativity is postulated by Albert Einstein.
243. _____ is same on every point on a rotating body.

1. Linear velocity
2. Linear momentum
3. Angular torque
4. Angular velocity

Option “4” is correct.
Angular Velocity is same on every point on a rotating body.
244. The path of a projectile is called its ______.

1. Altitude
2. Range
3. Trajectory
4. Flight

Option “3” is correct.
Trajectory is the path followed by a projectile flying or an object moving under the action of given forces, a curve or surface cutting a family.
245. Who invented the Contact Lens?

1. Enrico Fermi
2. Adolf Gaston Eugen Fick
3. Sandford Fleming
4. Benoit Fourneyron

Option “2” is correct.
Adolf Gaston Eugen Fick was credited with invention of the Contact Lens.
246. Electrons move around the nucleus in _______ motion.

1. Translatory
2. Spin
3. Orbital
4. Vibrational

Option “3” is correct.
Electrons move around the nucleus in orbital motion.
247. Blood pressure is measured by _______.

1. Barometer
2. Sphygmomanometer
3. Hydrometer
4. Thermometer

Option “2” is correct.
Sphygmomanometers is an instrument for measuring blood pressure, particularly in arteries. The two types of sphygmomanometers are a mercury column and a gauge with a dial face.
248. Isaac Newton invented ____________.

1. Thermometer
2. Reflecting Telescope
3. Hydraulic Accumulator
4. Transistor

Option “2” is correct.
The reflecting telescope invented by Sir Isaac Newton in 1671.
249. How many units of electricity will be consumed if you use a 60-watt electric bulb for 5 hours everyday for 30 days?

1. 12
2. 9
3. 6
4. 3

Option “2” is correct.
We know that-
Number of unit = kilowatt hour = watt x hour /1000
=(60×30×5)/1000=9 unit.
250. The important nuclear fuel available in India in abundance is :

1. Uranium
2. Thorium
3. Iridium
4. Plutonium

Option “2” is correct.
According to a report of Department of Atomic Energy in India, there are approximately 10.70 million tons of monazite, which contains 9,63,000 tons of Thorium Oxide (ThO2). India is one country that has an abundance of thorium. Andhra Pradesh has 35% of thorium reserve of India.
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