In the series RC circuit shown in the given figure, the rms value of the voltage E is 1 V. If the average power dissipated is equal to 500 mW, then the phase angle between the voltage and current will be

According to Kirchhoff’s voltage law, the algebraic sum of all IR drops and e.m.f. in any closed loop of a network is always

A. Negative

B. Positive

C. Determined by battery e.m.f.

D. Zero

The number of independent equations to solve a network is equal to

A. The number of chords

B. The number of branches

C. Sum of the number of branches and chords

D. Sum of number of branches, chords and nodes

A closed path made by several branches of the network is known as

A. Branch

B. Loop

C. Circuit

D. Junction

Which of the following is not a nonlinear element ?

A. Gas diode

B. Heater coil

C. Tunnel diode

D. Electric arc