Physics
Grade-9
Easy
Question
As the resistance increases, the number of electrons passing through the circuit is affected. What is the effect on the current in the circuit?
- Current increases
- Current decreases
- Current remains same
- Cannot say
Hint:
Resistance is inversely proportional to the current.
The correct answer is: Current decreases
Resistance is the opposition faced by the flow of electric current in a circuit.
We know,
R =
Consider the voltage of a circuit constant.
R
Thus, resistance is inversely proportional to the current.
Hence, when the resistance of a circuit increases, the current flow will decrease.
Related Questions to study
Physics
Look at the following graph:
Which statement is false about the graph?
Look at the following graph:
Which statement is false about the graph?
PhysicsGrade-9
Physics
Look at the following table.
The above table gives the resistivity of some common materials used as conductors at a fixed temperature. The worst conductor shown in the table is
Look at the following table.
The above table gives the resistivity of some common materials used as conductors at a fixed temperature. The worst conductor shown in the table is
PhysicsGrade-9
Physics
Look at the following table.
The above table gives the resistivity of some common materials used as conductors at a fixed temperature. The best conductor shown in the table is
Look at the following table.
The above table gives the resistivity of some common materials used as conductors at a fixed temperature. The best conductor shown in the table is
PhysicsGrade-9
Physics
What effect does a hotter temperature have on resistance?
What effect does a hotter temperature have on resistance?
PhysicsGrade-9
Physics
Which offers more resistance?
Which offers more resistance?
PhysicsGrade-9
Physics
A 10 Ω resistor is to be made from manganin wire with a cross-sectional area of 0.2 mm2 . If manganin has a resistivity of 48 ×10-8 Ohm-m, then the required length of this size manganin wire will be:
A 10 Ω resistor is to be made from manganin wire with a cross-sectional area of 0.2 mm2 . If manganin has a resistivity of 48 ×10-8 Ohm-m, then the required length of this size manganin wire will be:
PhysicsGrade-9
Physics
A copper cable has a length of 450 m and a cross-sectional area of 4.0 mm2. If the resistivity of the copper is 1.72 ×10-8 Ohm-m, then the resistance of this cable will be:
A copper cable has a length of 450 m and a cross-sectional area of 4.0 mm2. If the resistivity of the copper is 1.72 ×10-8 Ohm-m, then the resistance of this cable will be:
PhysicsGrade-9
Physics
The resistance of a material is most determined by four factors – length, cross-sectional area, type of material and _____.
The resistance of a material is most determined by four factors – length, cross-sectional area, type of material and _____.
PhysicsGrade-9
Physics
Resistance does not depend upon
Resistance does not depend upon
PhysicsGrade-9
Physics
Resistance can be described as the
Resistance can be described as the
PhysicsGrade-9
Physics
Identify the correct relation between resistance, resistivity, and area of cross-section and length.
Identify the correct relation between resistance, resistivity, and area of cross-section and length.
PhysicsGrade-9
Physics
If the length and area of cross-section remain the same and resistivity increases. What will be the effect on the resistance?
If the length and area of cross-section remain the same and resistivity increases. What will be the effect on the resistance?
PhysicsGrade-9
Physics
What is the reading on the multimeter?
What is the reading on the multimeter?
PhysicsGrade-9
Physics
A battery of 20 V is connected to a resister of 10Ω, as shown in the figure. The current in the ammeter will be
A battery of 20 V is connected to a resister of 10Ω, as shown in the figure. The current in the ammeter will be
PhysicsGrade-9
Physics
How much work is done when one coulomb charge moves against a potential difference of 1 Volt?
How much work is done when one coulomb charge moves against a potential difference of 1 Volt?
PhysicsGrade-9