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If fuse of 250 mA, 500 mA, 1 A, 5 A, an...

If fuse of 250 mA, 500 mA, 1 A, 5 A, and 10 A were available, which one would be the most suitable for protecting an amplifier short circuit of the most suitable for protecting an amplifier rated at 240 V, 180 W?

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The following instruments are available in a laboratory : (i) Milliammeter A_1 of range 0.300 mA and least count 10 mA Milliammeter A_2 of range 0.200 mA and least count 20 mA Voltmeter V_1 of range 0.3 V and least count 0.3 V Which pair of instruments would be the best choice for carrying out the experiment to determine the equivalent resistance of two resistors connected in series ?

(a) An electric iron is rated at 230 V, 750 W. Calculate (i) the maximum current, and (ii) the number of units of electricity it would use in 30 minutes. (b) Which of the following fuse ratings would be suitable for this electric iron ? 1 A, 3 A, 5 A, 13 A

Study the given data and answer the questions that follow. A sample of an enzyme called lactase was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of the enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule. Two assays were carried out. {:("Lactose concentration (% w/v)",15,15,15,15,15,15),("Concentration of enzyme smaple (%v/v)",0,5,10,15,20,25),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,25,50,75,100,125):} {:("Lactose concentration (% w/v)",0,5,10,15,25,30),("Concentration of enzyme smaple (%v/v)",5,5,5,5,5,5),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,15,25,35,40,40):} Which of the following assays would you expect to have the highest reaction rate ?

Study the given data and answer the questions that follow. A sample of an enzyme called lactase was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of the enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule. Two assays were carried out. {:("Lactose concentration (% w/v)",15,15,15,15,15,15),("Concentration of enzyme smaple (%v/v)",0,5,10,15,20,25),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,25,50,75,100,125):} {:("Lactose concentration (% w/v)",0,5,10,15,25,30),("Concentration of enzyme smaple (%v/v)",5,5,5,5,5,5),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,15,25,35,40,40):} Which of the following statements can be concluded from the two assays ?

Question Stimulus :- DIRECTIONS : Read the following passage carefully and answer the following questions The history of literature really began long before man learnt to write. Dancing was the earliest of the arts. Man danced for joy round his primitive camp fire after the defeat and slaughter of his enemy. He yelled and shouted as he danced and gradually the yells and shout became coherent and caught the measure of the dance and thus the first war song was sung. As the idea of God developed prayers were framed on generation to another, each generation adding something of its own As man slowly grew more civilized hee was compelled to invent some method of writing by three urgent necessities. Then were certain things that it was dangerous to forget and which, therefore, had to be recorded. It was often necessary to communicate with person who were some distance away and it was necessary to protect one's property by making tools cattle and so on, in some distinctive manner. So man taught himself to write and having learned to write purely for utilitarian reasons he used this new method for preserving his war songs and his prayers Of course, among these ancient people, there were only a very few individual who learned to write, and only a few could read what was written. What would be the most appropriate title of the passage ?

A common emitter circuit is used as an amplifier. Its current gain is 50 . If the input resistance is 1kohm and the input voltage is 5 V , then the output current (in mA) will be

LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. What is the advantage of the third wire of each connection in domestic...

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  2. List the colours of the three wires in the cable connected to the p...

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  3. If fuse of 250 mA, 500 mA, 1 A, 5 A, and 10 A were available, which ...

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  4. When does an electric short-circuit occur?

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  5. In which wire in a A.C. Housing circuit is the swicth introduced...

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  6. In household circuits, is a fuse wire connected in series or in parall...

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  7. Give two reasons why different electrical appliances in a domestic cir...

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  8. What is the usual colour of the insulation of : (a) live wire, (b) neu...

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  9. What is the main purpose of earthing an electrical appliance ?

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  10. Give two reasons why different electrical appliances in a domestic cir...

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  11. How should the electric lamps in a building be connected so that the s...

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  12. Fill in the following blanks with suitable words : (a) A fuse should...

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  13. (a) Of what substance is the fuse wire made ? Why ? (b) Explain why...

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  14. What type of elastic fuse is used in electrical appliances like car st...

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  15. Distinguish between the terms 'overloading' and 'short-circuiting' as ...

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  16. (a) When does a fuse cut off current ? How does it do it ? (b) What ...

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  17. Explain the importance of using in a household electric circuit (i) fu...

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  18. (a) An electric iron is rated at 230 V, 750 W. Calculate (i) the maxim...

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  19. What is the function of an earth wire? Why is it necessary to earth me...

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  20. (a) What current is taken by a 3 kW electric geyser working on 240 V m...

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