Question

Need by 12 pm July 30, 2020 with answers shown and explanation. Thank you.

R 1) Two resistors are connected to each other in parallel, one resistor has a known value of R, the resistance of the second one is unknown. If the equivalent of two resistors in parallel is equal to what is the resistance of the second one? A) R B) 2R E) 4R 2) Which one of the following sentences is correct about the velocity selector? A) The velocity of charged particles leaving a velocity selector are the same for all particles independent value of charge and value of mass. B) Velocity of a charged particle leaving a velocity selector is equal to v = B/E C) The velocity of a charge leaving the selector is independent of electric field. D) A velocity selector is made up of magnetic field and electric field which are parallel with respect to each other. E) The velocity of charge leaving the selector is independent of the magnetic field.

Answer 1

= R=R 1) Value of resistance of first resistor Let resistance of second resistor RI Equivalent resistance of resistance of resistors Reg Ro ola Req W www R २ RI D B A B of Parallel resistors is giren - - > + Equivalent resistance by Req Using values in 0 Ro RI we get - 2 = + ol- + ol- RI R Al-Al- dlerle R =R 5 R12 그 2 RI R resistance Answer = 22 So, R of second resistor is R. is option (A)