UNIT I ELECTRICAL CIRCUITS important questions
1. What is meant by charge?
Charge is an electrical property of the atomic particles which matter
consists. The charge of an electron is so small. Charge in motion represents
current. The unit of charge is coulomb.
2. What is meant by Current?
The flow of free electrons in a conductor is called current. Unit is
ampere (A). I = Q/t
3. What is meant by Voltage?
The poterntial difference between two points is called as voltage. Unit
is Volts (V). V=W/Q , W=work done in joules & Q = charge in coulombs
4. State Ohm’s Law.
The potential difference across any two ends of a conductor is directly
proportional to the current flowing between the two ends provided the
temperature of the conductor remains constant.
5. State Krichoff’s Voltage Law
KVL states that the algebraic sum of voltages in a closed path is
zero.
6. State Krichoff’s current Law.
KCL states that the algebraic sum of currents in a node is zero.
7. Give short notes on resistor.
www.BrainKart.com
, It is a property of a substance3 which opposes the flow of electrons. It is
denoted by R and its unit is Ohm
8. Distinguish between a Branch and a node of a circuit.
A pair of network which connects the various points of the network is
called branch A point at which two or more elements are joined together is
called node.
9. Distinguish between a mesh and a loop of a circuit.
A mesh is a loop that does not contain other loops. All meshes are loop,
but all loops are
not meshes. A loop is any closed path of branches
10. Write down the formula for a star connected network is converted into a
delta network?
RA=( R1 R2)/( R1 +R2+ R3) RB=( R1 R3)/( R1 +R2+ R3) RC=(
R2 R3)/( R1 +R2+ R3)
11. Write down the formula for a delta connected network is converted
into a star network?
R1=( RARB+RBRC+RCRA)/RC R2=( RARB+RBRC+RCRA)/RB R3=(
RARB+RBRC+RCRA)/RA
12. Define line currents and phase currents?
The currents flowing in the lines are called as line currents The currents
flowing through phase are called phase currents
www.BrainKart.com
1. What is meant by charge?
Charge is an electrical property of the atomic particles which matter
consists. The charge of an electron is so small. Charge in motion represents
current. The unit of charge is coulomb.
2. What is meant by Current?
The flow of free electrons in a conductor is called current. Unit is
ampere (A). I = Q/t
3. What is meant by Voltage?
The poterntial difference between two points is called as voltage. Unit
is Volts (V). V=W/Q , W=work done in joules & Q = charge in coulombs
4. State Ohm’s Law.
The potential difference across any two ends of a conductor is directly
proportional to the current flowing between the two ends provided the
temperature of the conductor remains constant.
5. State Krichoff’s Voltage Law
KVL states that the algebraic sum of voltages in a closed path is
zero.
6. State Krichoff’s current Law.
KCL states that the algebraic sum of currents in a node is zero.
7. Give short notes on resistor.
www.BrainKart.com
, It is a property of a substance3 which opposes the flow of electrons. It is
denoted by R and its unit is Ohm
8. Distinguish between a Branch and a node of a circuit.
A pair of network which connects the various points of the network is
called branch A point at which two or more elements are joined together is
called node.
9. Distinguish between a mesh and a loop of a circuit.
A mesh is a loop that does not contain other loops. All meshes are loop,
but all loops are
not meshes. A loop is any closed path of branches
10. Write down the formula for a star connected network is converted into a
delta network?
RA=( R1 R2)/( R1 +R2+ R3) RB=( R1 R3)/( R1 +R2+ R3) RC=(
R2 R3)/( R1 +R2+ R3)
11. Write down the formula for a delta connected network is converted
into a star network?
R1=( RARB+RBRC+RCRA)/RC R2=( RARB+RBRC+RCRA)/RB R3=(
RARB+RBRC+RCRA)/RA
12. Define line currents and phase currents?
The currents flowing in the lines are called as line currents The currents
flowing through phase are called phase currents
www.BrainKart.com
