CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A weak current can be detected by replacing electrici bulb in an electric tester with

A
LED
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
a coil wound over a compass needle
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
CFL
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
both (1) and (2)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D both (1) and (2)
Answer is D.
When a weak current is passed through a circuit with an electric bulb, the bulb does not glow as the current is not sufficient enough to do so. But, when the electric bulb is replaced by a LED bulb, it glows because an LED bulb requires only a small amount of current to glow. In the similar way, when a magnetic compass is connected in the same circuit, the needle shows slight deflection which indicates the presence of current. More the current, more the deflection. The needle comes to zero only when the current is zero.
Hence, a LED bulb or a magnetic compass indicates the presence of a weak current in the circuit.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Circles - Practice Set 1
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon