1. Review Ohm\'s Law. If you double the voltage across an ohmic resistor, what h
ID: 1585801 • Letter: 1
Question
1. Review Ohm's Law. If you double the voltage across an ohmic resistor, what happens to the current in the resistor? a. b. If the current in a 100 resistor is 2.5 amps, what is the voltage across the resistor? 2. The figure shows a solenoid Use the right hand rule to determine the direction of the magnetic field inside the solenoid. a. b. Sketch the magnetic field lines for the solenoid on the diagram shown and for c. Calculate the magnetic field inside the solenoid if it has 5000 turns, is 50 cm d. What is the magnetic flux in the solenoid (described in c) a cross section viewW long and carries a current of 0.5 A 4 cm 3. A bar magnet moves away from a coil, as shown in the figure. What is the direction of the current in the coil? Suppose you had a similar setup but with a different coil that has twice as many turns. How would you expect the current in the resistor to change? The motion of the magnet relative to the coils is the same for both coils. a. b.Explanation / Answer
Solving 1st question
Q1
(a) We know
By ohm law
R=V/I=constant
So if V is doubled,I will also double
(b)voltage=100*2.5=250 volts
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