could anyone help me explain and solve the physics question?see the following images ( inculding the answer
Answer is b This question assumes a specific type of inductor. The most simple inductor is the air core coil. In that type the length l of the coil is in the denominator of the expression for L. Thus if the length is half, L is doubled. Therefore a is NOT correct. R/L is half and VL(t) Vm*e^-Rt/L so the charge time IS NOT Doubled. It is longer but not doubled. Energy in the inductor EL 1/2 *L*I^2 is doubled when L is doubled so c is NOT correct The magnetic field in a coil IS proportional to the number of turns of wire per unit LENGTH. Thus the magnetic field in the coil IS DOUBLED too. So d is NOT correct. The answer must be b
