Electrical Resistance

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Part A What must the emf E in the figure (Figure 1) be in order for the current through the 7.00 N resistor to be 1.65 A ? Each emf source has negligible internal resistance. Express your answer with the appropriate units. E = Value Units Submit Request Answer Figure Provide Feedback Next > 24.0 V Ţ §7.00 $2.00 3.00 N

4. Four resistors are placed in series. The values of the resistors are 28.4 n, 4.25 N, 5ú.605 N, 0.75 N, with an uncertainty of one unit in the last digit of each number. Calculate the total series resistance, giving only sig- nificant figures in the answer.

Please show all work and circle your answers. Thank you

UPVOTE WILL BE GIVEN. PLEASE WRITE THE SOLUTIONS LEGIBLY. NO LONG EXPLANATION NEEDED. ANSWER IN 2 DECIMAL PLACES.

Please break this down for me as much as possible, im struggling to grasp kirchhoff's, thank you.

I want all the work and answers to these problems

A coil 4.40 cm in radius, containing 460 turns, is placed in a uniform magnetic field that varies with time according to B=( 1.20x10-2 T/s)t+(2.95x10-5 T/s4 )t¹. The coil is connected to a 680 2 resistor, and its plane is perpendicular to the magnetic field. You can ignore the resistance of the coil.

A galvanometer with a internal resistance of 400 and a shunt resistor of value 'Rsh' is connected in series with a 100 resistor. A constant voltage VO' is applied aoross the oircuit, and the galvanometer deflects a certain amount. The shunt resistor is then removed, and replaced in series with the 100 resistor. With the same voltage 'VO', the galvanometer deflection is unchanged. Calculate the value 'Rsh' of the shunt resistor.

Figure 1 shows the circuit diagram of an automotive lighting system, and all lamps has 500 Q resistance. 3. a) Describe the characteristics of a parallel circuit in terms of resistance current and voltage. b) Determine: The current generated by the battery if the brake switch is closed The current generated by the battery if the light switch is closed iii. The current generated by the battery if the light switch and high-beam switch are closed i. i. iv. The current generated by the battery if all switches are closed high-beam switch Lights switch Brake switch Right Left Right Left Right Left Right Left Low-beam Brake lights High-beam headlights Tailights headlights 12V Figure 1

hi i want urjent answer please help me

7. A 100 W incandescent lamp has a resistance when cold (lamp extinguished) that is only 1/12 of its hot (lamp illuminated) resistance value. a) What is the lamp current and its hot resistance when placed across a 120 V line? b) What is the cold resistance of this lamp? c) What is the instantaneous current through the lamp at the moment it is switched on? d) What power does the lamp dissipate at this instant?

A 100 μA ammeter has an internal resistance of 100 2. For extending its range to measure 500 µA, the required shunt resistance is?