1
MHT CET 2023 9th May Morning Shift
+1
-0

A long straight wire carrying a current of $$25 \mathrm{~A}$$ rests on the table. Another wire PQ of length $$1 \mathrm{~m}$$ and mass $$2.5 \mathrm{~g}$$ carries the same current but in the opposite direction. The wire PQ is free to slide up and down. To what height will wire PQ rise? ($$\mu_0=4 \pi \times 10^{-7}$$ SI unit)

A
3 mm
B
4 mm
C
5 mm
D
8 mm
2
MHT CET 2022 11th August Evening Shift
+1
-0

Two parallel conducting wires of equal length are placed distance 'd' apart, carry currents '$$\mathrm{I}_1$$' and '$$\mathrm{I}_2$$' respectively in opposite directions. The resultant magnetic field at the midpoint of the distance between both the wires is

A
$$\frac{\mu_0\left(I_1-I_2\right)}{\pi \mathrm{d}}$$
B
$$\frac{\mu_0\left(I_1+I_2\right)}{2 \pi d}$$
C
$$\frac{\mu_0\left(I_1-I_2\right)}{2 \pi \mathrm{d}}$$
D
$$\frac{\mu_0\left(I_1+I_2\right)}{\pi d}$$
3
MHT CET 2022 11th August Evening Shift
+1
-0

An electron and a proton having the same momenta enter perpendicularly into a magnetic field. What are their trajectories in the field?

A
Path of the electron is more curved than that of proton
B
They will travel undeflected
C
Path of the proton is more curved than that of the electron
D
Both the electron and the proton will move along the same curved path but they will move in opposite directions
4
MHT CET 2021 24th September Evening Shift
+1
-0

A solenoid 2 m long and 4 cm in diameter has 4 layers of windings of 1000 turns each and carries a current of 5 A. What is the magnetic field at its centre along the axis? [$$\mu_0=4\pi\times10^{-7}$$ Wb/Am]

A
$$10^{-3}$$ T
B
$$2\pi\times10^{-3}$$ T
C
$$4\pi\times10^{-3}$$ T
D
$$8\pi\times10^{-3}$$ T
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