Q. Two impedances 10 - j 10 and 10 + j 10 are connected in parallel. Their combined impedance is

View solution

Q. Resistivity of semiconductors is around 100 Ω-m.

View solution

Q. Two capacitors of 20 μF each are in series. The total capacitance is

View solution

Q. Thevenin's theorem is used to find current in a branch of a network. It is now desired to find current in another branch of the network

View solution

Q. A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be

View solution

Q. The correct relation between joules and calories is

View solution

Q. A voltage v = 100 sin (100 pt + 45°) V is applied to an impedance 10 + j10 ohm. The current is

View solution

Q. A 20 Ω resistor, a 1H inductor and 1μF capacitor are connected in parallel the combination is driven by a unit step current. Under the steady state, source current flows through

View solution

Q. A series resonant circuit has parameters 10 ω, 1 H and 0.1 F. It is excited by a voltage v = 100 sin ωt. At resonant frequency, the power dissipated in the circuit is

View solution

Q. Assertion (A): A tree of graph contains all the nodes of the graph.

Reason (R): The number of links is always less than the number of tree branches.

View solution

Q. Cells are connected in series to increase

View solution

Q. As per BIS, solid insulators are classified into 6 categories.

View solution

Q. Dielectric constant of air is about 5.

View solution

Q. Consider the following units

1. sec¯¹
2. rad²/sec²
3. sec
4. Ω

The units of R/L, 1/LC, RC and √L/C are respectively

View solution

Q. If f(t) = - f(- t) and f(t) satisfies Dirichlet conditions, then f(t) can be expanded in Fourier series having

View solution

Q. Consider the following

If a network has impedance (1 - j) at a specific frequency, the circuit would consists of series
1. R and C
2. R and L
3.R, L and C

Which of these statements is correct?

View solution

Q. Assertion (A): Power is the rate at which energy is supplied.

Reason (R): Energy = VIt.

View solution

Q. Assertion (A): The s domain impedance of a series R-L circuit is R + sL irrespective of initial conditions.

Reason (R): Complex frequency s = σ + jω.

View solution

Q. If Va = 10 ∠0, Vb = 10 ∠ -120° and Vc = 10 ∠ -240°, then Va2 and Va0 are

View solution

Q. A wire has a diameter d and resistance R. If the diameter is made 3d, the length and material remaining the same, the new value of resistance will be

View solution