Related InterviewSolutions

• Choose the quantity whose SI is not ohm.A. ResistanceB. ReactanceC. CapacitanceD. Impedance
• Identify the graph which correctly reperesents the variation of capacitive reactance `X_C` with frequencyA. B. C. D.
• Mutual inductance of two coils is 0.005H, ac in primary coil, `I=I_(0)sinomegat`, where `I_(0)=10A` and `omega=100pi` rad/s. What is the maximum emf in the secondary coil?
• A circular disc of radius 0.2 m is placed in a uniform magnetic field of induction `(1)/(pi)Wb//m^(2)` in such a way that its axis makes an angle `60^(@)` with the field. The magnetic flux linked with the disc isA. 0.01 WbB. 0.02 WbC. 0.06 WbD. 0.08 Wb
• A semicircular wire of radius r is rotating with angular velocity `omega` in a uniform magnetic field B with its radius as axis. If the resistance of the circuit be R and if the axis of rotation remains perpendicular to B, what will be the average power produced in each period?
• Write down the dimensional formula for induced emf?
• A circular conducting coil of radius a and resistance R is placed with its plane perpendicular to a magnetic field. The magnetic field varies with time according to the equation `B=B_(0)sinomegat`. Obtain the expression for the induced current in the coil.
• A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 T. The velocity of the conductor is 15 m/s and is directed perpendicular to the field. The emf induced between the two ends of the conductor isA. 0.10 VB. 0.15 VC. 1.50 VD. 15.00 V
• A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the loop. What is the mef developed across the cut if the velocity of the loop is 1 m. `s^(-1)` in a direction normal to the Suppose in this case the loop is stationary but the current feeding the electromagnet produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T. `s^(-1)`. If the cut is joined and the loop has a resistance of `1.6 Omega`, how much power is dissipated by the loop as heat? What is the source of this power?
• What will be the self-inductance of a solendoid of length 1m, diameter 12cm and number of turns 4000? How much energy will be stored in its magnetic field due to a current of 2A through it? `(mu_(0)=4pixx10^(-7)H.m^(-1))`.