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An electric kettle has a resistance of30?. What current will ?ow when it is connected to a 240V supply?
Find also the power rating of the kettle
A current of 5A ?ows in the winding of an electric motor, the resistance of the winding being 100?.
verfiy (a) the p.d. across the winding, and
(b) the power dissipated by the coil
Mica is a (A) Dielectric material. (B) Insulating material. (C) Magnetic material. (D) Both insulating and dielectric material. Ans: Mica is a both insulating and
Q. How will you measure thickness of thin silicon-chip using Bi-prism experiment? Derive the formula used. When a thin silicon chip, thin film of soap bubble etc. is introduc
suppose you are running and want to stop at once. surely you will have to produce negative acceleration in your speed. can you tell from where does the necessary force come ?
What are the main types of laser? Types of lasers are as illustrated below: a. Solid State lasers b. Raman laser c. Semiconductor lasers d. Dye lasers e. Gaseous
Suppose a baseball rolls 3.2 m across the floor. If the ball's angular displacement is 82 rad, what is the circumference of the ball?
In the thin lens equation first prove that Zz = f*f (Hint use this diagram along with the characteristics of similar triangles). Then use this equation along with the act that Z^
Explain the formation of newton ring
Majority and minority charge carriers A pure semiconductor has equal number of holes and electrons. But an extrinsic semiconductor has majority charge carriers. When a tri
discuss the orgin of energy band in solids
Platinum: Atomic number 78 Symbol p t Atomic weight 195.09 Discovery Olloa 1735
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