Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour ? Explain.

Mark ‘T’ if the statement is true and ‘F’ if it is false: Plants carry out photosynthesis only during the day and respiration only at night

An electrician has to repair an electric fault on a pole of height 4m. He needs to reach a point 1.3 m below the top of the pole to do the repair work. What should be the length of the ladder that he should use which when inclined at an angle of 60^(@) to the horizontal, enables him to reach the required position?

(i) How does overload and short-circuit occur in an electric circuit ? Explain . What is the function of fuse during this situation ? (ii) Mention two properties of magnetic field lines .

Direct nitration of aniline is not carried out. Explain why ?

The weather department has predicted that a thunderstorm is likely to occur on a certain day .Suppose you have to go out on that day. Would you carry an umbrella ? Explain.