A circular loop carrying a current is replaced by an equivalent magnetic dipole. A point on the axis of the loop is in: 

A circular loop carrying a current is replaced by an equivalent magnetic dipole. A point on the loop is in

1.  end-on position

2.  broadside-on position

3.  both

4.  none

When a current in a circular loop is equivalently replaced by a magnetic dipole:

Let r be the distance of a point on the axis of a bar magnet from its centre. The magnetic field at such a point is proportional to

1.   \(1 \over r\)

2.    \(1 \over r^2\)

3.     \(1 \over r^3\)

4.   none of these

Let \(r\) be the distance of a point on the axis of a magnetic dipole from its centre. The magnetic field at such a point is proportional to:
1. \(\dfrac 1 r\)
2. \(\dfrac 1 {r^2}\)
3. \(\dfrac 1 {r^3}\)
4. none of these

1. \(\frac{\mu_{\mathrm{0}}}{4 \pi} \frac{\mathrm{M}}{\mathrm{d}^{3}}\)
2. \(\frac{\mu_{0}}{4 \pi} \frac{\sqrt{2} \mathrm{M}}{\mathrm{d}^{3}}\)
3. \(\frac{\mu_{0}}{4 \pi} \frac{2\sqrt{2} \mathrm{M}}{\mathrm{d}^{3}}\)
4. \(\frac{\mu_{\mathrm{0}}}{4 \pi} \frac{\mathrm{2M}}{\mathrm{d}^{3}}\)

Which of the following four graphs may best represent the current-deflection relation in a tangent galvanometer? 

  
1. a
2. b 
3. c
4. d

A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled, the deflection will 

1.  increase

2.  decrease 

3.  remain unchanged

4.  either increase or decrease. 

Consider the following statements:

Choose the correct option from the given ones:

A horizontal circular loop carries a current that looks clockwise when viewed from above. It is replaced by an equivalent magnetic dipole consisting of a south pole \(S\) and a north pole \(N.\)

Choose the correct option from the given ones:
1. (a) and (b) only
2. (b) and (d) only
3. (c) and (d) only
4. (a) and (d) only