Lenz's law of electromagnetic induction states that
a force is exerted on a current-carrying conductor in a magnetic field
electromotive force id induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of flux linking the circuit
the induced current in a coil is in such a direction that it sets up a magnetic field which opposes the change producing it
Correct answer is D
No explanation has been provided for this answer.
8kg, 8N
1kg, 10N
64kg, 10N
8kg, 10N
Correct answer is D
m = 8kg, wt = 80 x \(\frac{1}{8}\) = 10N
0.4m
0.8m
2.5m
5.0m
Correct answer is A
L = \(\frac{RA}{e} = \frac{11 \times 4 \times 10^{-8}}{1.1 \times 10{-4}} = 0.4m\)
Which of the following statements explains lost volt in an electric circuit? The
total p.d from a source to maintain a flow of current through the circuit as well as the source
p.d to drive current through the circuit component except the source
p.d across all external components connected to the source of electricity
p.d across the internal resistance of the cell
Correct answer is D
The lostvolt is the potential drop in a cell due to internal resistance.
N7.20
N18.00
180.00
N720.00
Correct answer is A
Cost = \(\frac{Pt}{1000}\) x cost per kWh
= \(\frac{40 \times 72}{1000} \times 2.50 = N7.20\)