Light is invisible until it hits an object. It can only be visible to us whenever it get scattered or bounced off the dust particles in the intervening medium. We can see the source of light like stars at night as they are too dim to light up much but that light does hit our eyes and therefore we see the light. The above discussion on visibility of light is only confined to the electromagnetic radiation of wavelength from 400 nm to 700 nm which is called visible light, as these electromagnetic radiations gives the sensation of sight.
Light is, perhaps, the most wonderful of all visible things.
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JEE Main Mock Test Series
Online Test Series for JEE Main-2022 Gurukul’s Online Chapter Wise, Topic Wise and Mock Tests for JEE Main is a very effective test and assessment platform where students experience different type of tests with different level of toughness. It helps students to get comfortable with the actual exam. Click on the buttons to jump to the … Continue reading JEE Main Mock Test Series
Conceptual Questions Based On Current Electricity
Q.1. The standard resistance coil are made of manganin. Why?Answer: When current flows through a wire its temperature will increase. For alloys like manganin thetemperature coefficient of resistance is very small. Thus, even if the temperature of the coil increasesits resistance will remain constant. Q.2. Does the value of temperature coefficient of resistance always positive?Answer: … Continue reading Conceptual Questions Based On Current Electricity
Conceptual Questions Based On Electric Potential
Q.1. Why earth is considered to be at zero potential?Answer: Earth has very large size. Potential of earth does not change with small charge therefore it is considered as reference level and potential taken as zero. Q.2. If electric potential V within a certain region is constant, what is the nature of electric field inside … Continue reading Conceptual Questions Based On Electric Potential
Conceptual Questions Based On Capacitance
Q.1. Where is the knowledge of dielectric strength helpful?Answer: Dielectric strength is the maximum value of electric field that can be applied across an insulatorbefore its breakdown or the magnitude of electric field intensity across insulator at which it startsconducting. This value helps us in determining the value of maximum potential, which can be appliedacross … Continue reading Conceptual Questions Based On Capacitance
What will happen if the plates of a charged capacitor are suddenly connected by metallic wire?
If we connect the plates of a charged capacitor by metallic wire, then charge will begin to flow from higher potential to lower potential and the energy stored in the capacitor gets converted into heat energy. Therefore, the capacitor will be discharged immediately.
Assertion Reason Questions for Biology Chapter 21 Neural Control and Coordination
Directions: In the following questions, a statement of assertion is followed by a statement of reason.Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c) If Assertion is true … Continue reading Assertion Reason Questions for Biology Chapter 21 Neural Control and Coordination
Assertion Reason Questions for Biology Chapter 20 Locomotion and Movement
Directions: In the following questions, a statement of assertion is followed by a statement of reason.Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c) If Assertion is true … Continue reading Assertion Reason Questions for Biology Chapter 20 Locomotion and Movement
Assertion Reason Questions for Biology Chapter 19 Excretory Products and their Elimination
Directions: In the following questions, a statement of assertion is followed by a statement of reason.Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c) If Assertion is true … Continue reading Assertion Reason Questions for Biology Chapter 19 Excretory Products and their Elimination
Assertion Reason Questions for Biology Chapter 18 Body Fluids and Circulation
Directions: In the following questions, a statement of assertion is followed by a statement of reason.Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c) If Assertion is true … Continue reading Assertion Reason Questions for Biology Chapter 18 Body Fluids and Circulation
Assertion Reason Questions for Biology Chapter 17 Breathing and Exchange of Gases
Directions: In the following questions, a statement of assertion is followed by a statement of reason.Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c) If Assertion is true … Continue reading Assertion Reason Questions for Biology Chapter 17 Breathing and Exchange of Gases
