RRB NTPC 2020 Exam Important Physics Questions with Answers: RRB NTPC 2020 Computer Based Exam (CBT-1) will be conducted from 28th December 2020 Onwards for over 1.25 crore candidates. To score high marks in the exam candidates must start practicing the important topics and questions for RRB NTPC 2020 Exam. For the ease of the candidates, we have compiled Important General Science (GS) Physics Topics & Questions from the General Awareness Section based on the latest exam pattern of the RRB NTPC 2020 Exam.
RRB NTPC 2020 General Awareness - Important General Science (GS) Physics Topics & Questions
General Awareness is considered to be one of the highest-scoring sections of the RRB NTPC 2020 Exam and will be of 40 marks. This section aims at testing the candidates’ general awareness and knowledge of current affairs taking place around the world and in India. Let’s look at the important General Science - Physics topics that have appeared frequently in RRB NTPC Exam over the last few years.
General Awareness (GA) - General Science (GS)
Important inventions and their inventor
RRB NTPC 2020 General Science Physics Important Questions
1. Which of the following is false?
Sound waves are ____________ waves.
Explanation: Electromagnetic waves are not like sound waves because they do not need molecules to travel. This means that electromagnetic waves can travel through air, solid objects and even space.
2. Which of the following coloured light has the lowest frequency?
Explanation: Red has the longest wavelength among the given options.
From VIBGYOR - R (red) has the longest and V(violet) has the shortest
It is reverse for frequency.
3. An electric motor converts
- Mechanical energy into electrical energy.
- Thermal energy into electrical energy.
- Electrical energy into mechanical energy.
- Radiant energy into electrical energy.
Explanation: An electric motor converts electrical energy to mechanical energy.
4. Which one is not a good conductor of electricity?
Explanation: Porcelain is an excellent insulator for use at high voltage.
5. The technology developed to track enemy submarines in World War II was
Explanation: Two similar but different technological advances that figured prominently in the Allied victory in World War II were radar and sonar, both techniques for detecting the location and speed of enemy aircraft or submarines.
6. The first large scale electrical air conditioning was invented and used in 1902 by:
- Willis Carrier
- John Gorrie
- Stuart Cramer
- H. H. Schultz
Explanation: Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by Willis Haviland Carrier.
7. Zero degree centigrade is equal to what degree Fahrenheit?
Explanation: 0°C is equal to 32°F.
8. What is the gravitational force exerted on a mass called?
Explanation: The gravitational force exerted on an object near the earth's surface is called the object's weight.
9. The earth conductor provides a path to ground for:
- Circuit Current
- Leakage Current
- Over Current
- High Voltage
Explanation: To pass the leakage current to the earth.
10. A galvanometer is converted to a voltmeter by:
- adding a high resistance in series with the galvanometer
- adding a low resistance in parallel with the galvanometer
- increasing the number of windings of galvanometer coil
- decreasing the number of windings of the galvanometer coil
Explanation: A galvanometer can be converted into a voltmeter by connecting a high resistance called multiplier in series to the galvanometer.
Practicing Important Topics & Questions of the RRB NTPC Exam can help you in many ways in your exam preparation. Remember that there are no sectional time limits and no sectional cut-offs. Your job is to simply maximize your score however you can.