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) !!
- 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 theseAnswer – 2.0.136eV
Explanation :
The energy necessary to remove the electron from n = 10 the state in hydrogen atom will be 0.136eV - One nanometer is equal to …………………………
1. 10-9m
2. 10-8m
3. 10-12m
4. 10-10m
5. None of theseAnswer – 1.10-9m
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) - The fourth state of matter is known as
1. Solid
2. Liquid
3. Gas
4. Plasma
5. None of theseAnswer – 4.Plasma
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. - Which type of energy is oldest energy to man ?
1. Electrical energy
2. Heat Energy
3. Geothermal Energy
4. Solar Energy
5. None of theseAnswer – 3.Geothermal Energy
Explanation :
Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. - In a photocell light energy is converted into ……………………….
1. Heat Energy
2. Electrical Energy
3. Sound Energy
4. Electronic Energy
5. None of theseAnswer – 2.Electrical Energy
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 - The slope of ……………………… graph represents Acceleration
1. Velocity – time
2. Velocity – Frequency
3. Frequency – Amplitude
4. Speed – Voltage
5. None of theseAnswer – : 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 - Which is used to change the speed of the fan ?
1. Resistance
2. Transistor
3. Regulator
4. Accelerator
5. None of theseAnswer – 3.Regulator
Explanation :
Regulator is used to regulate/control the speed of the fan and provide a convenient environment for the residents. - 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 theseAnswer – 4.Increases
Explanation :
The temperature of metal wire increases when the current is passes through it - 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 theseAnswer – 4.AmplitudeExplanation :
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 - 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 theseAnswer – 1.11km/sec
Explanation :
escape velocity is the minimum speed needed for an object to “break free” from the gravitational attraction of a massive body. The escape velocity from Earth is about 40,270 km/h (25,020 mph). The maximum escape velocity of rocket to be launched into Space is 11km/sec
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