MCQ
The equation →∑e = ∑IR is applicable to which law?
- AKirchhoff’s second law.
- BKirchhoff’s junction rule.
- CKirchhoff’s third law.
- DNewton’s Law.
✓
Answer
- Kirchhoff’s second law.
Explanation:
The equation →∑e = ∑IR is applicable to Kirchhoff’s second law. This law is also known as Kirchhoff’s loop rule. This expression tells us that in a closed loop, the algebraic sum of the emfs is equal to the algebraic sum of the products of the resistance and currents flowing through them.
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
The length of a wire required to manufacture a solenoid of length l and self-induction L is (cross-sectional area is negligible)
A square of size $1 mm^2$ is being viewed through a magnifying glass, the image of the square has an area of $6.25 mm^2$. The magnification produced by the lens is ___________ .
→A 1mA beam of protons with a cross-sectional area of 0.5 sq. mm is moving with a velocity of 3 
. Then charge density of beam is
|
(a) 6.6 |
(b) 6.6 |
(c) 6.6 |
(d) None of these |
Assertion : The capacity of a given conductor remains same even if charge is varied on it.
Reason : Capacitance depends upon nearly medium as well as size and shape of conductor.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
In a CRT the acceleration of electrons is controlled by changing ________ between the cathode and anode:
The muscles of a normal eye are least strained when the eye is focused on an object:
- Far away from the eye.
- Very close to the eye.
- At about 25cm from the eye.
- At about 1m from the eye.
Isotopes of an element contain:
A man runs towards mirror at a speed of 15 m/s. What is the speed of his image
|
(a) 7.5 m/s |
(b) 15 m/s |
(c) 30 m/s |
(d) 45 m/s |
Mark the correct options:
3.8 days is the half-life period of a sample. After how many days, the sample will become 1/8th of the original substance
|
(a) 11.4 |
(b) 3.8 |
(c) 3 |
(d) None of these |