1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A negative charge particle is moving upward in a magnetic field which is towards north. The particle is deflected towards

A
North
B
South
C
East
D
West
2
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
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A long horizontal wire $$\mathrm{P}$$ carries current of $$50 \mathrm{~A}$$ from left to right. It is rigidly fixed. Another fine wire $$\mathrm{Q}$$ is placed directly above and parallel to $$\mathrm{P}$$. The mass of the wire is '$$\mathrm{m}$$' $$\mathrm{kg}$$ and carries a current of '$$\mathrm{I}$$' A. The direction of current in $$\mathrm{Q}$$ and position of wire $$\mathrm{Q}$$ from $$\mathrm{P}$$ so that the wire $$\mathrm{Q}$$ remains suspended are

A
$$ \text { Right to left, } \quad \frac{50 I \mu_0}{\pi m g} $$
B
$$ \text { Left to right, } \quad \frac{25 I \mu_0}{\pi m g} $$
C
$$ \text { Right to left, } \quad \frac{25 I \mu_0}{\pi m g} $$
D
$$ \text { Right to left, } \quad \frac{I \mu_0}{4 \pi m g} $$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A charge of $$+1 \mathrm{C}$$ is moving with velocity $$\vec{V}=(2 \mathrm{i}+2 \mathrm{j}-\mathrm{k}) \mathrm{ms}^{-1}$$ through a region in which electric field $$\vec{E}=(\mathrm{i}+\mathrm{j}-3 \mathrm{k}) \quad \mathrm{NC}^{-1}$$ and magnetic field $$\vec{B}=(\mathrm{i}-2 \mathrm{j}+3 \mathrm{k}) \mathrm{T}$$ are present. The force experienced by the charge is

A
$$ (5 i+6 j-7 k) N $$
B
$$ (5 i-6 j-9 k) N $$
C
$$ (-5 i-6 j-7 k) N $$
D
$$ (-5 i+6 j+9 k) N $$
COMEDK Subjects
EXAM MAP