1
NEET 2023 Manipur
+4
-1

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron:

A
will turn towards right of direction of motion
B
will turn towards left of direction of motion
C
speed will decrease
D
speed will increase
2
NEET 2023
+4
-1

A wire carrying a current $$I$$ along the positive $$\mathrm{x}$$-axis has length $$L$$. It is kept in a magnetic field $$\overrightarrow{\mathrm{B}}=(2 \hat{\mathrm{i}}+3 \hat{\mathrm{j}}-4 \hat{\mathrm{k}}) \mathrm{T}$$. The magnitude of the magnetic force acting on the wire is :

A
$$\sqrt{5} \mathrm{~IL}$$
B
$$5 \mathrm{~IL}$$
C
$$\sqrt{3}$$ IL
D
3 IL
3
NEET 2023
+4
-1

A very long conducting wire is bent in a semi-circular shape from $$A$$ to $$B$$ as shown in figure. The magnetic field at point $$P$$ for steady current configuration is given by :

A
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}$$ pointed away from the page
B
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]$$ pointed away from page
C
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]$$ pointed into the page
D
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}$$ pointed into the page
4
NEET 2022 Phase 2
+4
-1

A closely packed coil having 1000 turns has an average radius of 62.8 cm. If current carried by the wire of the coil is 1 A, the value of magnetic field produced at the centre of the coil will be (permeability of free space $$= 4\pi \times {10^{ - 7}}$$ H/m) nearly

A
10$$-$$3 T
B
10$$-$$1 T
C
10$$-$$2 T
D
102 T
EXAM MAP
Medical
NEET