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A power line is coupled capacitively through various parasitic capacitances to a shielded signal line as shown in the figure. The conductive shield is grounded solidly at one end. Assume that the length of the signal wire extending beyond the shield, and the shield resistance are negligible. The magnitude of the noise voltage coupled to the signal line is
On a winter day with atmospheric air at −15°C, the outside front wind-shield of a car has surface temperature of +2°C, maintained by blowing hot air on the inside surface. If the wind-shield is 0.5 m2 and the outside convection coefficient is 250 W/Km2, find the rate of energy loss through front wind-shield.
The solar radiation that is felt at the earth’s surface includes (i) Direct radiation that has passed through the atmosphere (ii) Diffuse radiation from the sky (iii) Absorbed radiation from the water Identify the correct statement
Consider the following statements:
1. The variation in an average annual range of temperature at 15° latitude of Southern Hemisphere is much less than that at 15° latitude of Northern Hemisphere.
2. At latitudes poleward of 35° the incoming radiation exceeds the outgoing radiation in. Northern Hemisphere, whereas in Southern Hemisphere the outgoing radiation exceeds the incoming radiation.
Which of the statements given above is/are correct?
In the question given below, the sentence is divided into three parts I, II and III. For each part an alternate statement is also given. You have to determine if a part requires correction, and then mark that as your answer. In politics and public policy, nationalism is a (I)/ doctrine which mission is to protect a nation's right to self-govern and shield (II)/ fellows residents of a state from global economic and social pressures. (III) I. In politics and public policy, nationalism is an II. doctrine the mission of which is to protect a nation's right to self-govern and shield III. fellow residents of a state from global economic and social pressures.
A thin shield of emissivity E 3 on both sides is placed between two infinite parallel plates of emissivities E 1 and E 2 and temperatures T 1 and T 2. If E 1 = E 2 = E 3, then the fraction radiant energy transfer without shield takes the value
Consider the given statements and decide which of the assumptions is/are implicit in the statement. Statement: Shyam says to Ram, I would like to find out the effect of mobile radiation on the children. Assumptions: I. One can trace the effect of mobile radiation on children. II. Shyam is very good at detecting mobile radiation effects.
Suppose 100 units of solar radiation enters the earth's atmosphere. Based on this information, which of the following statements is absolutely correct? I. Radiation lost to space through scattering will be higher than reflected by the clouds. II. Approximately 20 units of radiation will be received by the earth's surface.
All the forms of matter except gases emit electromagnetic radiation continuously. The gases which electrically or thermally excited emit a certain wavelength only, then which of the following is/are true about the process (i) The spacing between the atoms in the other forms of matter is high than in gas (ii) The spacing between the atoms in gases is high than the other forms of matter (iii) The energy of the emitted radiation depends on the spacing between the atoms (iv) The wavelength of the emitted radiation depends on the spacing between the atoms 
Consider the given statements and decide which of the conclusions logically follow follow from the statements. Statement: All laptops are electronics. All electronics emit radiation. Conclusions: 1. All laptops emit radiation. 2. Some radiation is due to electronics.