Related InterviewSolutions

• shown in the figure is a small loop that is kept co-axially with the bigger loop. If the slider moves from `A` to `B`, then A. Current flow in both the loops will be in opposite senses.B. Clockwise current in loop `1` and anti-clockwise current in loop `2` flowC. No current flows in loop `2`D. Clockwise current flows in loop `2`
• A conducting loop is pulled with a constant velocity towards a region of unifrom maganetic field of induction `B` as shown in the figure. Then the current involved in the loop is `(d gt r)` A. clockwise while enteringB. anti-clockwise while enteringC. zero when completely insideD. clockwise while leaving
• The coefficient of mutual inductance of the two coils is `0.5 H`. If the current is increased from `2` to `3` `A ln 0.01 sec`. In one of them, then the induced e.m.f. in the second coil is :A. `25V`B. `50V`C. `75V`D. `100V`
• A resistor `R`, an inductor `L` and a capacitor `C` are connected in series to a source of frequency `n`. If the resonant frequency is `n_(r)`, then the current lags behind voltage whenA. `n=0`B. `n lt n_(r)`C. `n=n_(r)`D. `n gt n_(r)`
• An ideal choke takes a current of `8A` when connected to an a.c. source of `100` volt and `50Hz`. A pure resistor under the same conditions takes a current of `10A`. If two are connected in series to an `a.c.` supply of `100V` and `40Hz`, then the current in the series combination of above resistor and inductor isA. `10A`B. `8A`C. `5sqrt(2)`ampD. `10sqrt(2)`amp
• A conducting loop of resistance `R` and radius `r` has its center at the origin of the co-ordinate system in a magnetic field of induction `B`. When it is rotated about `Y`-axis through `90^(@)`, net charge flown in the coil is directly proportional to A. `B`B. `R`C. `r^(2)`D. `r`