MCQ
Kirchhoff ’s first rule at a junction in an electrical network, deals with conservation of:
  • A
    Energy.
  • B
    Charge.
  • C
    Momentum.
  • D
    Both energy and charge.

Answer

  1. Charge.

Explanation:

The Kirchoff law is applied to find the charge/ current in the circuit by applying loop rule and junction rule.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A big drop is formed by mixing 64 small drops. If each small drop has charge Q, then the charge on the big drop will be

When   transforms to , then the number of the emitted a- and b-particles is, respectively

(a) 8α, 7β

(b) 4α, 7β

(c) 4 α, 4β

(d) 4α, 1β

Which one of the following graphs in following figure represents variation of reactance ′Xc′​ of a capacitor with frequency 'f' of an ac supply?

For comparing the e.m.f.'s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful

(a) The e.m.f. of the standard cell is larger than the E e.m.f.'s of the two cells

(b) The diameter of the wires is the same and uniform throughout

(c) The number of wires is ten

(d) The e.m.f. of the standard cell is smaller than the e.m.f.'s of the two cells

In an interference arrangement similar to Young's double slit experiment, the slits S1 and S2 are illuminated with coherent microwave sources each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by distance d = 150 m. The intensity I (𝜃) is measured as a function of q, where q is defined as shown. If I0 is maximum intensity, then I(θ)  for 0 ≤ θ ≤ 90° is given by

(a) I(θ) =   for  θ = 0°

(b) I(θ) =   for θ = 30°

(c) I(θ) =    for θ =  90°

(d) a, b

A real image is formed by:

For which colour, the angle of deviation is maximum when light enters into glass from air?
The desirable properties for making permanent magnets are:
  1. High retentivity and high coercive force.
  2. High retentivity and low coercive force.
  3. Low retentivity and high coercive force.
  4. Low retentivity and low coercive force.
Which theory explained that electrons revolved in circular orbits?

The ratio of the magnetic field at the centre of a current carrying circular wire and the magnetic field at the centre of a square coil made from the same length of wire will be

(a)

(b)

(c)

(d)