Aashish Ingle India

SVVV - Shri Vaishnav Vidyapeeth Vishwavidyalaya

 B-Tech Notes All Subject

A bulb rated at 60W, 120V is used for 30 minutes. The charge associated with this operation is

(a) 3600 C
(b) 900 C
(c) 7200 C
(d) 60 C

Ans. (b) 900 C

In a purely inductive circuit the current …….the voltage by …..

(a) lags, 00
(b) leads, 900
(c) lags, 900
(d) lags, 450

Ans. (c) lags, 900 

Two voltage are v1 = 100 sin(ωt+150 ) and v2 = 60 cos ωt, then

(a) v1 is leading v2 by 150
(b) v1 is leading v2 by 750
(c) v2 is leading v1 by 750
(d) v2 is leading v1 by 150


Ans. (c) v2 is leading v1 by 750

Three resistance of 15Ω each are connected in delta. The resistance of equivalent star will have a value of

(a) 12Ω
(b) 5Ω
(c) 5/3Ω
(d) 45Ω

Ans. (b) 5Ω 

A source is delivering maximum power to a resistance through a network. The ratio of power delivered to the source power

(a) is always 0.5
(b) may be 0.5 or less
(c) may be 0.5 or less or more
(d) may be 0.5 or more

Ans. (b) may be 0.5 or less 

When determining Thevenin’s resistance of a circuit

(a) all sources must be open circuited
(b) all sources must be short circuited
(c) all voltage sources must be open circuited and all current sources must be short circuited
(d) all sources must be replaced by their internal resistances

Ans. (d) all sources must be replaced by their internal resistances

Kirchhoff’s laws are applicable to

(a) dc only
(b) as sinusoidal wave only
(c) dc and ac sinusoidal waves
(d) all wave shapes

Ans. (d) all wave shapes 

An ideal current source has


(a) infinite source resistance
(b) zero source resistance
(c) large value of source resistance
(d) finite value of source resistance

Ans. (a) infinite source resistance

In a practical voltage source, the terminal voltage______.

(a) cannot be less than source voltage
(b) cannot be higher than source voltage
(c) is always less than source voltage
(d) is always equal to source voltage


Ans.  (b) cannot be higher than source voltage 

Two capacitors of 2 μF and 4 μF capacitance are connected in series across a 30 V dc battery. After the capacitors have been charged, the voltage across them will be_____.

(a) 15 V each
(b) 10 V and 20 V respectively
(c) 20 V and 10 V respectively
(d) 30 V each

Ans. (c) 20 V and 10 V respectively 

Two capacitors of 1 μF and 2 μF are connected in series across a 30 V dc battery. After the capacitors have been charged, the charges across the two capacitors will be____.

(a) 10 μC each
(b) 20 μC each
(c) 10 μC and 20 μC
(d) 20 μC and 10 μC

Ans.  (b) 20 μC each

Two capacitors of 1 μF and 2μF capacitance are connected in parallel across a 30 V dc battery. After the capacitors have bean charged, the charges across the two capacitors will be____.


(a) 30 μC each
(b) 60 μC each
(c) 30 μC and 60 μC respectively
(d) 60 μC and 30 μC respectively


Ans. (c) 30 μC and 60 μC respectively 

Two capacitor each of capacitance C and breakdown voltage V are joined in series. The capacitance and breakdown voltage of the combination is


(a) 0.5 C and 2 V
(b) 0.5 C and 0.5 V
(c) C and V
(d) 2 C and 2 V

Ans. (a) 0.5 C and 2 V 

The correct relation between energy and charge is


(a) Energy = voltage / charge
(b) Charge = Energy x voltage
(c) Energy = voltage (charge)0.5
(d) Energy = voltage x charge

Ans. (b) Charge = Energy x voltage

One coulomb charge is equal to the charge on.

(a) 6.24 x 1018 electrons
(b) 6.24 x 1024 electrons
(c) 6.24 x 1018 atoms
(d) none of the above

Ans. (a) 6.24 x 1018 electrons 

The condition, that a 2-port network is reciprocal, can be expressed in terms of its ABCD parameters as…….

Ans.   AD – BC = 1

Two Two-port networks are connected in cascade. The combination is to the represented as a single two – port network, by multiplying the individual


(a) z-parameter matrices
(b) h-parameter matrices
(c) y-parameter matrices
(d) ABCD parameter

Ans. (d) ABCD parameter

A ramp voltage, v(t) = 100 t volts, is applied to an RC differentiating circuit with R = 5 kΩ and C = 4 µF. The maximum output voltage is

(a) 0.2 volt
(b) 2.0 volts
(c) 10.0 volts
(d) 50.0 volts

Ans. (b) 2.0 volts 

A 10 Ω resistor, a 1 H inductor and 1 µF capacitor are connected in parallel. The combination is driven by a unit step current. Under the steady state condition, the source current flows through.


(a) the resistor
(b) the inductor
(c) the capacitor only
(d) all the three elements


Ans. (a) the resistor