Ex. 5: A moving coil galvanometer has 100 turns and effective area 0.05 m². It is suspended in a radial magnetic field of induction 0.01 Wb/m². If the torque per unit twist of suspension fibre is 5 x 10-⁹ Nm/degree find the sensitivity of MCG.
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- Problem 17:In the figure (Figure 1) a conducting rod of length L = 40.0 cm moves in a magnetic field B of magnitude 0.410 T directed into the plane of the figure. The rod moves with speed v = 5.60 m/s in the direction shown. Part F What is the potential difference across the rod if it moves parallel to ab? Express your answer in volts. Figure < 1 of 1 ? V = 0.91 V B х ахDesign a current loop that, when rotated in a uniform magnetic field of strength 0.67 T, will produce an emf E = E, sin(wt), where E, = 110 V and w = 120n rad/s. First, choose the number of turns the loop should have. (Enter a positive integer less than 100.) turns Then calculate the needed area of the loop (in m2). (Use the number of turns you entered above.) m2
- A 1450 turn coil of wire, 6.16 cm in diameter, is in a magnetic field that drops from 0.723 T to 0 T in 41.9 ms. The axis of the coil is parallel to the field. What is the emf (in V) of the coil?Needs Complete typed solution with 100% accuracy.A stationary square coil of area 0.1 m2 is brought over time of 2 s into the magnetic field 8.8 T with its plane perpendicular to the magnetic field. The coil has 1317 turns. Calculate the magnetic flux linkage through the coil. Give your answer in Sl units. Answer: Choose... +
- The figure below shows a loop of wire of mass ?=0.0200 kg, width ?=0.0554 m, and resistance ?=0.235 ? dropping out of a region of constant magnetic field of magnitude ?=2.51 T pointing into the page. As long as the top of the loop is in the magnetic field, the equation describing the speed of the loop ? is given by ???/??+??^2?^2/?=??. Replacing the speed by the current ?. this equation has the same form as that for a series RL circuit. What is the speed of the loop after ?=0.440 s?(Hand by written ans.)A circular loop (10 turns) with a radius of 29 cm is in a magnetic field that oscillates uniformly between 0.95 T and 0.45 T with a period of 1.00 s. a. How much time is required for the field to change from 0.95 T to 0.45 T? b. What is the cross-sectional area of one turn of the loop? c. Assuming that the loop is perpendicular to the magnetic field, what is the induced emf in the loop? I have a test and i am revising and I got 2 answers for this question. could you please explain each step thoroughly for me to understand.An 18 cm diameter loop of wire consists of 28 turns of circular copper wire 2.5 mm indiameter. A uniform magnetic field, perpendicular to the plane of the loop, changes ata rate of 8.5 x 10-3 T/s. What is the current in the loop? The resistivity of copper is 1.68 x 10-8 W m. (Hint: solve for V and R, then solve for I)
- In the figure (Figure 1) the top wire is 1.1 −mm−mm -diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current flow through the two bottom wires is 75 AA in each. Calculate the required current flow in the suspended wire. Express your answer using two significant figures. ICu=____________AShown in the figure below is a rectangle of wire immersed in a magnetic field. The rectangle has length L = 2 meters, width w = 2 meters, and a resistance of R = 7.97 Ω. The magnetic field varies with time according to the equation:B(t) = 5t2 + 2t5As a result of the varying field, a voltage and current will be established in the loop.Answer all of the following: What is the FORMULA for the rate of change of magnetic field with time, dB dt = What is the FORMULA for the rate of change of magnetic flux with time, dΦB dt = What is the voltage in the circuit at t=1.1 seconds? Volts What is the current in the circuit at this same time? Amps NOTE: Make all formulas POSITIVE (field and flux). Make all values POSITIVE (voltage and current). Format your equations as atn + btm where a,b,n,m are numerical values. Example: 12t2 + 72t3