1
COMEDK 2024 Evening Shift
+1
-0

A wire of length $$2 \mathrm{~m}$$ carries a current of $$1 \mathrm{~A}$$ along the $$\mathrm{x}$$ axis. A magnetic field $$B=B_0(i+j+k)$$ tesla exists in space. The magnitude of magnetic force on the wire is

A
2B$$_0$$ N
B
Zero
C
3B$$_0$$ N
D
2$$\sqrt2$$B$$_0$$ N
2
COMEDK 2024 Morning Shift
+1
-0

Current flows through uniform, square frames as shown in the figure. In which case is the magnetic field at the centre of the frame not zero?

A
A
B
D
C
C
D
B
3
COMEDK 2024 Morning Shift
+1
-0

Two similar coils $A$ and $B$ of radius '$$r$$' and number of turns '$$N$$' each are placed concentrically with their planes perpendicular to each other. If I and $$2 \mathrm{I}$$ are the respective currents passing through the coils then the net magnetic induction at the centre of the coils will be:

A
$$\sqrt{3}\left(\mu_0 \frac{\mathrm{NI}}{2 \mathrm{r}}\right)$$
B
$$\sqrt{5}\left(\mu_0 \frac{\mathrm{NI}}{2 \mathrm{r}}\right)$$
C
$$5 \mu_0 \frac{\mathrm{NI}}{2 \mathrm{r}}$$
D
$$3 \mu_0 \frac{\mathrm{NI}}{\mathrm{r}}$$
4
COMEDK 2024 Morning Shift
+1
-0

A circular coil of radius $$0.1 \mathrm{~m}$$ is placed in the $$\mathrm{X}-\mathrm{Y}$$ plane and a current $$2 \mathrm{~A}$$ is passed through the coil in the clockwise direction when looking from above. Find the magnetic dipole moment of the current loop

A
$$0.02 \pi \mathrm{Am}^2 \text { in the -ve } \mathrm{X} \text { - direction }$$
B
$$0.02 \pi \mathrm{Am}^2 \text { in the }-\mathrm{ve} \mathrm{~Z}-\text { direction }$$
C
$$0.02 \pi \mathrm{Am}^2 \text { in the }+ \text { ve } \mathrm{Y}-\text { direction }$$
D
$$0.02 \pi \mathrm{Am}^2 \text { in the }+ \text { ve } \mathrm{Z}-\text { direction }$$
EXAM MAP
Medical
NEET