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A bar magnet is moved along the axis of a copper ring placed far away from the magnet. Looking from the side of the magnet, an anticlockwise current is found to be induced in the ring. Which of the following may be true?
21
Oct
A bar magnet is moved along the axis of a copper ring placed far away from the magnet. Looking from the side of the magnet, an anticlockwise current is found to be induced in the ring. Which of the following may be true? A bar magnet is moved along the axis of a copper ring [...]
A semicircle conducting ring of radius R is placed in the xy plane, as shown in figure. A uniform magnetic field is set up along the x-axis . No emf, will be induced in the ring if
21
Oct
A semicircle conducting ring of radius R is placed in the xy plane, as shown in figure. A uniform magnetic field is set up along the x-axis . No emf, will be induced in the ring if A semicircle conducting ring of radius R is placed in the xy plane as shown in figure. A [...]
A plane rectangular loop is placed in a magnetic field. The emf induced in the loop due to this field is ε1 whose maximum value is εim. The loop was pulled out of the magnetic field at a variable velocity. Assume that B is uniform and constant ε1 is plotted against t as shown in the graph. Which of the following are/is correct statement(s):
21
Oct
A plane rectangular loop is placed in a magnetic field. The emf induced in the loop due to this field is ε1 whose maximum value is εim. The loop was pulled out of the magnetic field at a variable velocity. Assume that B is uniform and constant ε1 is plotted against t as shown in [...]
For given electromagnetically coupled circuits : ( S is initially in closed state )
21
Oct
For given electromagnetically coupled circuits : ( S is initially in closed state ) For given electromagnetically coupled circuits : ( S is initially in closed state ) October 21, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A highly conducting ring of radius R is perpendicular to and concentric with the axis of a long solenoid as shown in Fig. 3.182. The ring has a narrow gap of width δ in its circumference. The cross-sectional area of the solenoid is a. The solenoid has a unifoem unitial field of magnitude B(t)=B0+βt, where β>0. Assuming that no charge can flow across the gap, the face (s) accumulating an excess of positive charge is /are
21
Oct
A highly conducting ring of radius R is perpendicular to and concentric with the axis of a long solenoid as shown in Fig. 3.182. The ring has a narrow gap of width δ in its circumference. The cross-sectional area of the solenoid is a. The solenoid has a unifoem unitial field of magnitude B(t)=B0+βt, where [...]
A uniform circular loop of radius a and resistance R palced perpendicular to a uniform magnetic field B. One half of the loop is rotated about the diameter with angular velocity ω as shown in Fig. Then, the current in the loop is
21
Oct
A uniform circular loop of radius a and resistance R palced perpendicular to a uniform magnetic field B. One half of the loop is rotated about the diameter with angular velocity ω as shown in Fig. Then, the current in the loop is a magnetic field of 1 T exists. The electric current in the [...]
A conducting wire of length l and mass m can slide without friction on two parallel rails and is connected to capacitance C. The whole system lies in a magnetic field B and a constant force F is applied to the rod . Then
21
Oct
A conducting wire of length l and mass m can slide without friction on two parallel rails and is connected to capacitance C. The whole system lies in a magnetic field B and a constant force F is applied to the rod . Then a magnetic field of 1 T exists. The electric current in [...]
A circular loop of radius r, having N turns of a wire, is placed in a uniform and constant magnetic field B. The normal of the loop makes an angle θ with the magnetic that the angle θ is constant. Choose the correct statement from the following.
21
Oct
A circular loop of radius r, having N turns of a wire, is placed in a uniform and constant magnetic field B. The normal of the loop makes an angle θ with the magnetic that the angle θ is constant. Choose the correct statement from the following. A circular loop of radius r having N [...]
The magnetic flux ϕ linked with a conducting coil depends on time as ϕ = 4 t n +6, where n is a positive constant. The induced emf in the coil is e.
21
Oct
The magnetic flux ϕ linked with a conducting coil depends on time as ϕ = 4 t n +6, where n is a positive constant. The induced emf in the coil is e. The magnetic flux ϕ linked with a conducting coil depends on time as ϕ = 4 t n +6 where n is [...]
In figure, R is a fixed conducting ring of negligible resistance and radius a. It is hinged at the center of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength B pointing inward and r is a stationary resistance. Then
21
Oct
In figure, R is a fixed conducting ring of negligible resistance and radius a. It is hinged at the center of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength B pointing inward and r is a stationary resistance. Then [...]