# GK Questions: General Science(Physics) – Set 10

Hello Aspirants. Welcome to Online General Knowledge section in Affairs cloud, which is important for all the competitive exams. We have created Some questions related to General Science(Physics) !!

1. The Energy required to remove an electron in a hydrogen atom from state is
1. 13.6eV
2. 0.136eV
3. 1.36eV
4. 0.00136eV
5. None of  these
Explanation :
The energy necessary to remove the electron from n = 10 the state in hydrogen atom will be 0.136eV

2. One nanometer is equal to …………………………
1. 10-9m
2. 10-8m
3. 10-12m
4. 10-10m
5. None of  these
Explanation :
The nanometre or nanometer is a unit of length in the metric system, equal to one billionth of a metre ( 0.000000001 m or 10-9m)

3. The fourth state of matter is known as
1. Solid
2. Liquid
3. Gas
4. Plasma
5. None of  these
Explanation :
Plasma is one of the four fundamental states of matter, the others being solid, liquid, and gas. A plasma has properties unlike those of the other states.

4. Which type of energy is oldest energy to man ?
1. Electrical energy
2. Heat Energy
3. Geothermal Energy
4. Solar Energy
5. None of  these
Explanation :
Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter.

5. In a photocell light energy is converted into ……………………….
1. Heat Energy
2. Electrical Energy
3. Sound Energy
4. Electronic Energy
5. None of  these
Explanation :
Photocell is a solid-state electronic device that converts light into electrical energy by producing a voltage or that uses light to regulate the flow of current

6. The slope of ……………………… graph represents Acceleration
1. Velocity – time
2. Velocity – Frequency
3. Frequency – Amplitude
4. Speed – Voltage
5. None of  these
Answer – : 1.Velocity – time
Explanation :
The slope of Velocity – time graph represents Acceleration. The velocity vs. time graphs for the two types of motion – constant velocity and changing velocity
Acceleration  is the rate of change of velocity of an object

7. Which is used to change the speed of the fan ?
1. Resistance
2. Transistor
3. Regulator
4. Accelerator
5. None of  these
Explanation :
Regulator is used  to regulate/control the speed of the fan and provide a convenient environment for the residents.

8. The temperature of metal wire …………………………..when the current is passes through it
1. None of these
2. Constant
3. Decreases
4. Increases
5. All of  these
Explanation :
The temperature of metal wire increases when the current is passes through it

9. When a light wave is reflected from a mirror, there is a change in its ………………………….
1. Refractive Index
2. Reflective Index
3. Frequency
4. Amplitude
5. None of  these
When a light wave is reflected from a mirror, there is a change in its amplitude because reflected wave is reflected in phase with the incoming wave

10. What is the maximum escape velocity of rocket to be launched into Space ?
1. 11km/sec
2. 14km/sec
3. 22km/sec
4. 35km/sec
5. None of  these