0.0N
2.0 x 10-21N
1.3 x 10-17N
5.1 x 10-14N
2.3 x 1013N
Correct answer is C
F = Bqv = 5.0 x 10-5 x 1.6 x 10-19 x 106
= 1.3 x 10-17
Lenz's law of electromagnet states that
the induced charge is constant for a fixed change of force
a force is exerted on a current-carrying conductor in a magnetic field
the magnitude of the induced e.m.f in a circuit is proportional to the rate of change of the number of lines of force linking the circuit
the induced current in a conductor is in such a direction as to oppose the change producing it
e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
Correct answer is D
No explanation has been provided for this answer.
depression
declination
variation
elevation
dip
Correct answer is E
No explanation has been provided for this answer.
Calculate the resistance of the filament of lamp rated at 240V 60W
240\(\Omega\)
360\(\Omega\)
960\(\Omega\)
144\(\Omega\)
2880\(\Omega\)
Correct answer is C
P = \(\frac{V^2}{R} = \frac{240^2}{60} = 960\)
5.0\(\Omega\)
4.5\(\Omega\)
2.4\(\Omega\)
2.0\(\Omega\)
1.8\(\Omega\)
Correct answer is D
E.M.F (E) = 1.5v, Internal Resistance (r) = ?, Potential Difference (V) = 0.9v, Load resistance (R) = 3Ω,
Current (I) = V / R = 0.9 / 3 = 0.3A
USING : E = I ( R + r )
r = (E / I) - R = (1.5 / 0.3) - 3
r = 5 - 3
r = 2Ω,
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