Current electricity multiple choice questions with answers: In this blog post (Electricity MCQ), we have written Physics MCQs on Current Electricity.
Current electricity multiple choice questions with answers
1. The binding force between electrons and the nucleus in an atom is known as
The Columb force
The Van-der-Walls force
The gravitational force
The restoring force
2. The direction of electric current in an electrical field is the direction of movement of
Positive Charge
Negative Charge
Nucleus
Valence electrons
3. The electric current through a conductor is the rate of transfer of charge across a surface placed
along the direction of flow
normal to the direction of flow
opposite to the direction of flow
at an angle of 45o to the direction of flow
4. Ampere is the unit of
Electric Potential
Electric Charge
Electric Current
Electric Field
5. Ohm’s Law is a relation between
Relation between current in a conductor and potential difference
Relation between electric charge in a conductor and Electric field
Relation between electric charge in a conductor and potential difference
Relation between electric current in a conductor and Electric charge
6. Electric current in conducting wires of the same diameter
increases with length
decreases with length
is independent of its length
difficult to predict
7. Electric current in conducting wires of the same length
increases with cross-sectional area
decreases with cross-sectional area
is independent of its cross-sectional area
difficult to predict
8. Specific resistance or resistivity of a conducting wire
increases with its length
decreases with cross-sectional area
is only a characteristic of the material of the wire
is the same as its resistance
9. Unit of resistivity is
ohm
ohm-metre
mho-metre
ohm-1-metre-1
10. 1Color code for a carbon resistor of value 1Ω is
red, brown, black
black, brown, black
black, brown, brown
brown, brown, black
11. Silver ring after colored rings represent tolerance in value of resistance of
2 %
5 %
10 %
20 %
12. Golden ring after colored rings represent tolerance in value of resistance of
2 %
5 %
10 %
20 %
13. For metals, resistivity
increases with temperature
decreases with temperature
does not change with temperature
changes exponentially with temperature
14. Kirchhoff’s first rule deals with the following at a junction in an electrical circuit
branching of electric charge
branching of electric current
branching of electric field
none of the above
15. Kirchhoff’s second rule states that the algebraic sum of all the potential differences along a closed loop in a circuit is
Zero
Infinite
Equal to the square of potential difference
Sum of the product of currents and voltages
16. Wheatstone bridge is balanced
when no current flows through the galvanometer
when maximum current flow through the galvanometer
is independent of current flowing through the galvanometer
none of the above
17. Wheatstone bridge is most sensitive when
when all four resistances are of high value
when all four resistances are of low value
when all four resistances are equal
none of the above