1) The work done in moving a unit charge across two points in an electric circuit is a measure of ________
2) Which unit can be used to measure current ?
3) If the amount of electric charge passing through a conductor in minutes is 300 C, the current flowing is _______
4) A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is ______
5) The substance having infinitely high electrical resistance __________
6) The resistance of a wire of length 300 m and cross-section of area 1.0 mm² made of resistivity 1.0 × 10^-7 Ωm is is called _______
Answers
Question ❶ :
›»› The work done in moving a unit charge across two points in an electric circuit is a measure of ________
Answer :
›»› The work done in moving a unit charge across two points in an electric circuit is a measure of potential difference.
Question ❷ :
›»› Which unit can be used to measure current ?
Answer :
›»› Ampere is the unit can be used to measure current.
Complete Question ❸ :
›»› If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is _______
Answer :
›»› The current flowing is 0.5 A.
Given :
- Amount of charge flowing in conductor = 300 C.
- Time = 10 min
To Calculate :
- Current flowing in the conductor = ?
Calculation :
Converting time from min to Second,
→ 1 min = 10 sec.
→ 10 min = 10 * 60
→ Time = 600 sec.
As we know that
→ Current = Charge/Time
→ Current = 300/600
→ Current = 3/6
→ Current = 0.5
Hence, the current flowing in the conductor is 0.5 A.
Question ❹ :
›»› A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is ______
Answer :
›»› The resistance of the light bulb is 24 Ω.
Given :
- Voltage = 12 V.
- Current flowing = 0.5 A.
To Calculate :
- Resistance of the light bulb = ?
Calculation :
As we know that
→ Resistance = Voltage/Current
→ R = V/I
→ R = 12/0.5
→ R = 24 Ω
Hence, the resistance of the light bulb is 24 Ω.
Question ❺ :
›»› The substance having infinitely high electrical resistance __________
Answer :
›»› The substance having infinitely high electrical resistance insulators.
Question ❻ :
›»› The resistance of a wire of length 300 m and cross-section of area 1.0 mm² made of resistivity 1.0 × 10^-7 Ωm is is called _______
Answer :
›»› Resistance of wire is 30 Ω.
Given :
- The resistance of a wire of length 300 m.
- Cross-section of area 1.0 mm².
- Resistivity = 1.0 × 10⁻⁷.
To Calculate :
- Resistance = ?
Calculation :
Converting Cross-section of area from mm² to m²
→ 1 square milimiter = 1 * 10⁻⁶
→ Area = 1.0 mm²
→ Area = 10⁻⁶ m²
As we know that
→ ρ = RA/l
→ R = ρl/A
→ R = (10⁻⁷ * 300)/10⁻⁶
→ R = 30 Ω
Hence, the resistance of wire is 30 Ω.
Hence Solved !
Answer:
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Explanation:
Question ❶ :
›»› The work done in moving a unit charge across two points in an electric circuit is a measure of ________
Answer :
›»› The work done in moving a unit charge across two points in an electric circuit is a measure of potential difference.
Question ❷ :
›»› Which unit can be used to measure current ?
Answer :
›»› Ampere is the unit can be used to measure current.
Complete Question ❸ :
›»› If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is _______
Answer :
›»› The current flowing is 0.5 A.
Given :
Amount of charge flowing in conductor = 300 C.
Time = 10 min
To Calculate :
Current flowing in the conductor = ?
Calculation :
Converting time from min to Second,
→ 1 min = 10 sec.
→ 10 min = 10 * 60
→ Time = 600 sec.
As we know that
→ Current = Charge/Time
→ Current = 300/600
→ Current = 3/6
→ Current = 0.5
Hence, the current flowing in the conductor is 0.5 A.
Question ❹ :
›»› A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is ______
Answer :
›»› The resistance of the light bulb is 24 Ω.
Given :
Voltage = 12 V.
Current flowing = 0.5 A.
To Calculate :
Resistance of the light bulb = ?
Calculation :
As we know that
→ Resistance = Voltage/Current
→ R = V/I
→ R = 12/0.5
→ R = 24 Ω
Hence, the resistance of the light bulb is 24 Ω.
Question ❺ :
›»› The substance having infinitely high electrical resistance __________
Answer :
›»› The substance having infinitely high electrical resistance insulators.
Question ❻ :
›»› The resistance of a wire of length 300 m and cross-section of area 1.0 mm² made of resistivity 1.0 × 10^-7 Ωm is is called _______
Answer :
›»› Resistance of wire is 30 Ω.
Given :
The resistance of a wire of length 300 m.
Cross-section of area 1.0 mm².
Resistivity = 1.0 × 10⁻⁷.
To Calculate :
Resistance = ?
Calculation :
Converting Cross-section of area from mm² to m²
→ 1 square milimiter = 1 * 10⁻⁶
→ Area = 1.0 mm²
→ Area = 10⁻⁶ m²
As we know that
→ ρ = RA/l
→ R = ρl/A
→ R = (10⁻⁷ * 300)/10⁻⁶
→ R = 30 Ω
Hence, the resistance of wire is 30 Ω.
Hence Solved !