1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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?

COMEDK 2024 Morning Shift Physics - Moving Charges and Magnetism Question 4 English

A
A
B
D
C
C
D
B
3
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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
$$ 0.02 \pi \mathrm{Am}^2 \text { in the }+ \text { ve } \mathrm{Z}-\text { direction } $$
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