MCQ
Force between the two parallel wires carrying currents has been used to define:
- AAmpere
- BCoulomb
- CVolt
- DWatt
✓
Answer
- Ampere
Explanation:
Ampere is defined as the constant current that will produce an attractive force of 2×10−7 newton per metre of length between two straight, parallel conductors (carrying the constant current) of infinite length and negligible circular cross section placed one metre apart in a vacuum. This is the Ampere's Force Law.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A particle having rest mass to travel with speed of light in vacuum. Its de-Broglie wavelength will be __________ .
How many types of electron emissions exist?
Fermi level of energy of an intrinsic semiconductor lies
|
(a) In the middle of forbidden gap |
(b) Below the middle of forbidden gap |
|
(c) Above the middle of forbidden gap |
(d) Outside the forbidden gap |
The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statments are made in this regard:
S1 : At any point inside the sphere, electric intensity is zero.
S2 : At any point inside the sphere, the electrostatic potential is 100V.
Which of the following is a correct statement?
S1 : At any point inside the sphere, electric intensity is zero.
S2 : At any point inside the sphere, the electrostatic potential is 100V.
Which of the following is a correct statement?
In case of a virtual and erect image, the magnification created by the mirror is:
Gauss’s law is true only if force due to a charge varies as
|
(a) |
(b) |
(c) |
(d) |
Which of the following graphs may represent the relation between the capillary rise h and the radius r of the capillary?
In which of the following remote sensing technique is not used
|
(a) Forest density |
(b) Pollution |
(c) Wetland mapping |
(d) Medical treatment |
An alternating current having peak value 14A is used to heat a metal wire. To produce the same heating effect, a constant current i can be used where i is:
A point charge is kept at the centre of metallic insulated spherical shell. Then: