Q1/ An electron is accelerated through an electric potential of 229 V, then enters a 22 Gauss magnetic field in a

direction at a right angle to the magnetic field vector. Find the radius (in cm) of the subsequent circular path for this electron. Express the answer (without the unit) with two decimal places.

Q2/ Mark all that are correct:

– Gauss = 10000 Weber

– Tesla = 10⁴ Gauss

– Gauss = 10^-4 Tesla

– Tesla = 10^-4 N

– Gauss = 10⁴ H

– H = 100 Teslas

– N= 1000 Gauss

-N = 10⁴ Tesla

-H = 10 Teslas

-H = 10^-4 Gauss

Q3/ Two charges Q₁ = 42 nC and Q₂ = 45 nC are in rest on the horizontal axis. The distance between the charges is 0.85 m. What is the value of the magnetic field at the point between the charges which is 0.16 m away from charge Q₁? Express the answer as a whole number.

Q4/ Find the magnetic field strength (in Gauss) for a current of 1.8 A in the Helmholtz coils with 141 turn, assuming a coil radius of 10 cm. Express the answer with one decimal place.

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