The rate at which a dial-up connection can send data across a telephone wire is known as a _____ rate
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What are the factors on which resistance of a conductor depends?2. What is an ammeter? How is it connected in a circuit? Give reason.3. What is a voltmeter? How is it connected in a circuit? Give reason.4. What happens when voltmeter is connected in series and ammeter is connected in parallelIn a circuit?5. A wire has resistance of 10 ohm, if it is melted and redrawn to (a) double is length and (b)half of its radius, find the new resistance in both cases.6. A wire of resistance 20 ohm is bent in the form of a closed circle. What is effective resistancebetween the two points at the ends of any diameter of a circle?7. A wire 2 m long, 0.1 mm in diameter and has resistance of 20 ohm. Calculate the resistivityof its material.8. Two wires one thin another thick are made of same material. Can they have sameresistance? If yes under what conditions?9. Find the resistance of wire which is 1 m long having the diameter 0.1 mm and resistivity ofthe wire is 4.9 × 10-7 Ωm. What is the current flowing through the wire, when a potentialdifference of 2V is applied across its ends?10. Which type of combination should be used for increasing and decreasing the resistance?11. A wire whose resistance is 80 ohm is cut into 4 pieces of equal lengths which are thenarranged in parallel. Calculate the resistance of the combination?12. Six equal resistances of 2 ohms are connected to form a hexagon ABCDEFA. Calculate theequivalent resistance offered by combination if current enters at one point and leaves atopposite end.13. In a circuit, two resistors of 10 ohm and 20 ohm are connected in parallel. Compare thecurrent passing through the two resistors.14. An electric bulb is rated as 50 W, 220 V. Calculate the energy consumed by the bulb in 20minutes. Express your answer in commercial units of electrical energy.15. Why is tungsten used almost exclusively for filament of electric lamps?16. Why are copper and aluminum wires usually used for electricity transmission?17. What is meant by power rating of an appliance? A bulb is rated as 60 W, 220V.What does itindicate?18. Rating of a bulb is 220 V, 110 W, if this bulb is connected to 100 V, calculate powerconsumed by it and electric current through it.19. If 100 W and 400 W bulbs are connected in series to a supply, which bulb will glow brighterand why?20. Two identical resistors, each of resistance 20 ohm are connected (a) in series (b) in parallelwith 8 V battery. Calculate the ratio of power consumed in the combination of resistors intwo cases.21. Two resistances when connected in series give resultant of 9 ohm and when connected in
parallel give resultant of 2 ohm. Calculate the value of each resistance.