Answer these questions please it will help me
Answers
Answer:
CHEMISTRY
Choose the correct answer:-
1. Hydrogen
3. Ethanol
PHYSICS
choose the correct alternative among the given four answer:-
1. rheostat
2. +0.33
3. increases heavily
answer the following questions:-
2.The electric generator works on the principle of electromagnetic induction, in which when a straight conductor moves in a magnetic field, then the current is induced in the conductor.
3.We prefer a convex mirror as a rear-view mirror in vehicles because it gives a wider field of view, which allows the driver to see most of the traffic behind him. ... Convex mirrors always form a virtual, erect, and diminished image of the objects placed in front of it.
5. P = 1/f = 1D
1DPower of the lens is the ability of a lens to converge the rays falling on it.
1DPower of the lens is the ability of a lens to converge the rays falling on it.One dioptre is the power of the lens whose focal length is 1m.
10..The main function of earth wire is to protect appliances from sudden damage due to leakage of current.
main function of earth wire is to protect appliances from sudden damage due to leakage of current. The earthing of metallic appliances is necessary to prevent severe electric shock to the users. The metallic body of electric appliances is connected to earth wire so that any leakage of electric current is transferred to the ground.
11. Function of brushes:-
There are two brushes and in the electric generator, one brush is at all times in contact with the arm moving up in the field, while the other is in contact with the arm moving down. Because of these Brushes unidirectional current is produced.
I have send the pic of electric generator answer no. 11
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