An 8-bit weighted resistor digital-to-analog converter (DAC) has the smallest resistance of 500 Ω. The largest resistance has a value

An 8-bit weighted resistor digital-to-analog converter (DAC) has the smallest resistance of 500 Ω. The largest resistance has a value

Q. An 8-bit weighted resistor digital-to-analog converter (DAC) has the smallest resistance of 500 Ω. The largest resistance has a value Sol: In general, in a binary weighted resistor DAC, the relationship between LSB and MSB resistance is given as :LSB Resistance =(2n−1) MSB resistance where, n is the number of bits in the DAC.Given, n=8smallest resistance =500ΩMSB resistance =500Ω∴LSB […]

An 8-bit weighted resistor digital-to-analog converter (DAC) has the smallest resistance of 500 Ω. The largest resistance has a value Read More »

In the circuit shown below, initially the switch S1 is open, the capacitor C1 has a charge of 6 coulomb, and the capacitor C2 has 0 coulomb

In the circuit shown below, initially the switch S1 is open, the capacitor C1 has a charge of 6 coulomb, and the capacitor C2 has 0 coulomb

Q. In the circuit shown below, initially the switch S1 is open, the capacitor C1 has a charge of 6 coulomb, and the capacitor C2 has 0 coulomb. After S1 is closed, the charge on C2 in steady state is coulomb. Sol: When switch open, Q1 = 6 C, Q2 = 0 C, C1 =

In the circuit shown below, initially the switch S1 is open, the capacitor C1 has a charge of 6 coulomb, and the capacitor C2 has 0 coulomb Read More »

Consider a circuit comprising only resistors with constant resistance and ideal independent DC voltage sources. If all the resistances are scaled down by a factor 10

Consider a circuit comprising only resistors with constant resistance and ideal independent DC voltage sources. If all the resistances are scaled down by a factor 10

Q. Consider a circuit comprising only resistors with constant resistance and ideal independent DC voltage sources. If all the resistances are scaled down by a factor 10, and all source voltages are scaled up by a factor 10, the power dissipated in the circuit scales up by a factor of Sol: Let the equivalent circuit

Consider a circuit comprising only resistors with constant resistance and ideal independent DC voltage sources. If all the resistances are scaled down by a factor 10 Read More »

A 3 × 3 matrix has eigenvalues 1, 2 and 5. The determinant of the matrix is              .

A 3 × 3 matrix has eigenvalues 1, 2 and 5. The determinant of the matrix is              .

Q. A 3 × 3 matrix has eigenvalues 1, 2 and 5. The determinant of the matrix is              . Sol: Given that, Eigen values of a matrix λ1 = 1, λ2 = 2, λ3 = 5 From the property of Eigen values, Determinant of a matrix = product of its Eigen values ⇒ Determinant =

A 3 × 3 matrix has eigenvalues 1, 2 and 5. The determinant of the matrix is              . Read More »

In a single-mode optical fiber, the zero-dispersion wavelength refers to the wavelength at which the

In a single-mode optical fiber, the zero-dispersion wavelength refers to the wavelength at which the

Q. In a single-mode optical fiber, the zero-dispersion wavelength refers to the wavelength at which the (A) material dispersion is zero. (B) waveguide dispersion is zero. (C) sum of material dispersion and waveguide dispersion is zero. (D) material dispersion and waveguide dispersion are simultaneously zero. Ans: sum of material dispersion and waveguide dispersion is zero.

In a single-mode optical fiber, the zero-dispersion wavelength refers to the wavelength at which the Read More »

Four strain gauges in a Wheatstone bridge configuration are connected to an instrumentation amplifier as shown in the figure. From the choices given below

Q. Four strain gauges in a Wheatstone bridge configuration are connected to an instrumentation amplifier as shown in the figure. From the choices given below, the preferred value for the common mode rejection ratio (CMRR) of the amplifier, in dB, would be Ans: 100 Sol: CMRR of an amplifier is given by Where Ad is

Four strain gauges in a Wheatstone bridge configuration are connected to an instrumentation amplifier as shown in the figure. From the choices given below Read More »

The correct biasing conditions for typical operation of light emitting diodes, photodiodes, Zener diodes are, respectively

Q. The correct biasing conditions for typical operation of light emitting diodes, photodiodes, Zener diodes are, respectively (A) forward bias, reverse bias, reverse bias (B) reverse bias, reverse bias, forward bias (C) forward bias, forward bias, reverse bias (D) reverse bias, forward bias, reverse bias Ans: forward bias, reverse bias, reverse bias

The correct biasing conditions for typical operation of light emitting diodes, photodiodes, Zener diodes are, respectively Read More »

In the circuit shown below, the input voltage 𝑉𝑖𝑛 is positive. The current (𝐼) - voltage (𝑉) characteristics of the diode can be assumed to be 𝐼

In the circuit shown below, the input voltage 𝑉𝑖𝑛 is positive. The current (𝐼) – voltage (𝑉) characteristics of the diode can be assumed to be 𝐼

Q. In the circuit shown below, the input voltage 𝑉𝑖𝑛 is positive. The current (𝐼) – voltage (𝑉) characteristics of the diode can be assumed to be 𝐼 = 𝐼0𝑒𝑉/𝑉𝑇 under the forward bias condition, where 𝑉𝑇 is the thermal voltage and 𝐼0 is the reverse saturation current. Assuming an ideal op-amp, the output voltage

In the circuit shown below, the input voltage 𝑉𝑖𝑛 is positive. The current (𝐼) – voltage (𝑉) characteristics of the diode can be assumed to be 𝐼 Read More »

If each of the values of inductance, capacitance and resistance of a series LCR circuit are doubled, the Q-factor of the circuit would

If each of the values of inductance, capacitance and resistance of a series LCR circuit are doubled, the Q-factor of the circuit would

Q. If each of the values of inductance, capacitance and resistance of a series LCR circuit are doubled, the Q-factor of the circuit would (A) reduce by a factor √2 (B) reduce by a factor 2 (C) increase by a factor √2 (D) increase by a factor 2 Ans: reduce by a factor 2 Sol:

If each of the values of inductance, capacitance and resistance of a series LCR circuit are doubled, the Q-factor of the circuit would Read More »

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