A beam of well collimated cathode rays travelling with a speed of 5×10−6ms−1 enters a region of mutually perpendicular electric and magnetic fields and emerge undeviated from this region. If |B| = 0.02T , the magnitude of the electric field is

Question:

A beam of well collimated cathode rays travelling with a speed of 5×10⁻⁶ms⁻¹ enters a region of mutually perpendicular electric and magnetic fields and emerge undeviated from this region. If |B| = 0.02T , the magnitude of the electric field is

Options :

(a) 10^5vm^-1
(b) 2.5×10^8Vm^-1
(c) 1.25×10^10Vm^-1
(d) 2×10^3Vm^-1

Answer :

(a) 10⁵vm^-1

Answer Steps :

step 1:

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