- 1(current)
Q. No.A square of side \(L\) meters lies in the \(x\text-y\) plane in a region, where the magnetic field is given by \({B}=B_0(2 \hat{i}+3 \hat{j}+4 \hat{k}) ~\text{T}\), where \(B_0\) is constant. The magnitude of flux passing through the square is:
| 1. | \(2 B_0 L^2 ~\text{Wb}.\) | 2. | \(3 B_0 L^2 ~\text{Wb}.\) |
| 3. | \(4 B_0 L^2 ~\text{Wb}.\) | 4. | \(\sqrt{29} B_0 L^2 ~\text{Wb}.\) |
Subtopic: Magnetic Flux |
70%
From NCERT
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A loop, made of straight edges has six corners at \(A(0,0,0), B(L, 0,0), C(L,L,0), D(0,L,0), E(0,L,L)\) and \(F(0,0,L).\) A magnetic field \(B=B_0(\hat{i}+\hat{k})~\text{T}\) is present in the region. The flux passing through the loop \(ABCDEFA\) (in that order) is:
| 1. | \(( B_0 L^2 )~\text{Wb} \) | 2. | \((2 B_0 L^2 )~\text{Wb} \) |
| 3. | \(( \sqrt{2} B_0 L^2 )~\text{Wb} \) | 4. | \((4 B_0 L^2) ~\text{Wb} \) |
Subtopic: Magnetic Flux |
From NCERT
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A cylindrical bar magnet is rotated about its axis (see figure). A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then:
| 1. | a direct current flows in the ammeter \(A\). |
| 2. | no current flows through the ammeter \(A\). |
| 3. | an alternating sinusoidal current flows through the ammeter \(A\) with a time period \(T=2π/ω.\) |
| 4. | a time varying non-sinosoidal current flows through the ammeter \(A\). |
Subtopic: Magnetic Flux |
From NCERT
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