5.0 x 10-5N
5.0 x 10-4N
5.0 x 105N
5.0 x 106N
Correct answer is B
F = qvB
= 10 x 10-6 x 1.0 x 105 x 10-4
= 5.0 x 10-4N
In storing magnets, keepers are used to
reduced self-demagnetization
cancel the effect of the earth's magnetic field
protect the magnet from stray electric field
increase the strangth of the magnets
Correct answer is A
No explanation has been provided for this answer.
S and N
N and N
S and S
N and S
Correct answer is B
No explanation has been provided for this answer.
Which of the following factors does not affect the e.m.f of a primary cell? Its
size
internal resistance
operating temperature
duration of usage
Correct answer is A
No explanation has been provided for this answer.
induction
friction
conduction
convection
Correct answer is B
No explanation has been provided for this answer.
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