i only
ii only
iii only
i and iii only
Correct answer is C
No explanation has been provided for this answer.
A direct current of 5A flow through a 0.2H inductor. Calculate the energy stored in the inductor
0.5J
1.0J
2.5J
5.0J
Correct answer is C
P = \(\frac{1}{2} I^2 L\)
= 5\(^2 \times\) 0.2 \(\times\) \(\frac{1}{2}\)
= 2.5J
5
12
2000
2400
Correct answer is A
\(\frac{E_s}{E_p} = \frac{N_s}{N_p} = \frac{240}{12} \frac{100}{N_p}\)
Np = 5
Fleming's right hand rule is also called the
motor rule
dynamo rule
screw rule
thumb rule
Correct answer is B
No explanation has been provided for this answer.
Which of the following actions will not increase the sensitivity of a moving coil galvanometer?
using a strong temporary magnet
increasing the area and number of turns of the coil
using a week hair spring
using a light pointer
Correct answer is D
No explanation has been provided for this answer.