1. A galvanometer coil has resistance 50Ω and current 30 MA .How can you current it into
i) ammeter (0-5A)
ii) voltmeter (0-10)
2. what is galvanometer .How can you convert it into ammeter and voltmeter
3. Find the total resistance in the following circuit
1. At what temperature would be the speed of sound in oxygen be the same as tha tin nitrogen at 30 O0 C ? Given their densities at 00 C are in the ratio 8:7
2. What is the % change in speed pf sound i gas when the absolute temperature is increased by
125% ?
3. Why is sound heard distinctly at night than in the day time ?
4. What is hall effect ? Obtain an expression for the Hall emf in terms of area of cross dection , width of strip , magnetic field strength ¤t in strip
5. What do you mean by current sensitivity ? What are the way to increase sensitivity of galvanometer
6. A horizontal wire wire 0.1 m long carries a current of 5A .Find the magnitude and direction of the magnetic field which can support the weight of wire assuming its mass to be 3x10-4 kg
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