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

The dimension $$[\mathrm{ML}^{-1} \mathrm{~T}^{-2}]$$ is the physical quantity of

A
Pressure $$\times$$ Area
B
$$\mathrm{\frac{Force}{Pressure}}$$
C
Power $$\times$$ Time
D
Energy density
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The resistance of a $$10 \mathrm{~m}$$ long wire is $$10 \Omega$$. Its length is increased by $$25 \%$$ by stretching the wire uniformly. The new resistance is

A
$$18.6 \Omega$$
B
$$15.6 \Omega$$
C
$$12.8 \Omega$$
D
$$14.9 \Omega$$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body is executing SHM. When its displacements from the mean position are $$4 \mathrm{~cm}$$ and $$5 \mathrm{~cm}$$ it has velocity $$10 \mathrm{~cms}^{-1}$$ and $$8 \mathrm{~cms}^{-1}$$ respectively. Its periodic time $$\mathrm{t}$$ is

A
$$\frac{2 \pi}{3} \sec$$
B
2$$\pi$$ sec
C
$$\frac{3 \pi}{2} \mathrm{sec}$$
D
$$\pi$$ sec
EXAM MAP