Question

A conducting rod of length L = 0.30 m moves in a magnetic field (directed in the - z direction) of magnitude 0.45 T. The bar is oriented along the y axis and moves with a speed of 5.0 m/s. What are the magnitudes of the motional EMF induced in the bar if the bar moves in the + x direction and if it moves in the + z direction? a) b) c) d) + x direction 0.675 V 0V 0.675 V 0V + z direction OV OV 0.675 V 0.675 V 5. A 45-mH ideal inductor is connected in series with a 60-2 resistor through an ideal 15-V DC power supply and an open switch. If the switch is closed at timef= s, what is the current 7.00 ms later? a) 850 mA b) 650 mA c) 350 mA d) 280 mA e) 250 mA 6 A series LRC circuit consists of a 12.0-mH inductor, a 15.0uF capacitor, a resistor, and a 116-Y (rmes) ac voltage source. If the impedance of this circuit is 45.02 at resonance, what is its impedance at a frequency twice the resonance frequency? a) 73.22 1) 66.812 e) 64322 d) 61.82

Answer 1

Forte on charge i* F=qv . Eleche field generated E E VBe or +x dinrution O.62 V E = sxo.30x 045 T For tz direthor, UxB-o cinte V/| Agwer Z +x direhon OV 0.6S V Currend ongh induchor is given I= ¥(I- p (-Kt 4Sm I: 250mA

Rersonane freuey ed/sec J12x1IS Sec 12x 1-5x10 ५= २35+ rede w- 2R 414 a X wL 12x/x = 56.5z2 1414 Z=JR -a 1) = 61.85 2 Answer- 61-8