Q6. The resistivity of a potentiometer wire is 10-7 Ωm and its cross-section area is 10-6 m². When a

Q: What is the correct answer for CUET UG Physics Q6?

The correct answer is b. The potential gradient (K) of a wire is the potential drop per unit length. It can be calculated as K = V/L. Using Ohm's law, V = IR. The resistance of a wire (R) is given by R = ρL/A, where ρ is resistivity, L is length, and A is cross-sectional area. Substituting R into Ohm's law: V = I * (ρL/A). So, the potential gradient K = V/L = (I * ρL/A) / L = Iρ/A.Given: ρ = 10⁻⁷ Ωm, A = 10⁻⁶ m², I = 0.1

Q: Q6. The resistivity of a potentiometer wire is 10-7 Ωm and its cross-section area is 10-6 m². When a current of 0.1 A follows through the wire, its potential gradient is: (a) 10-1 V/m (b) 10-2…

The correct answer is b. The potential gradient (K) of a wire is the potential drop per unit length. It can be calculated as K = V/L. Using Ohm's law, V = IR. The resistance of a wire (R) is given by R = ρL/A, where ρ is resistivity, L is length, and A is cross-sectional area. Substituting R into Ohm's law: V = I * (ρL/A). So, the potential gradient K = V/L = (I * ρL/A) / L = Iρ/A.Given: ρ = 10⁻⁷ Ωm, A = 10⁻⁶ m², I = 0.1

Q: What are the options for this CUET UG Physics question?

A. 10-1 V/m · B. 10-2 V/m · C. 10-4 V/m · D. 10 V/m

Question

Q6. The resistivity of a potentiometer wire is 10-7 Ωm and its cross-section area is 10-6 m². When a current of 0.1 A follows through the wire, its potential gradient is:
(a) 10-1 V/m
(b) 10-2 V/m
(c) 10-4 V/m
(d) 10 V/m

FirstInTest · Accepted Answer

The potential gradient (K) of a wire is the potential drop per unit length. It can be calculated as K = V/L. Using Ohm's law, V = IR. The resistance of a wire (R) is given by R = ρL/A, where ρ is resistivity, L is length, and A is cross-sectional area. Substituting R into Ohm's law: V = I * (ρL/A). So, the potential gradient K = V/L = (I * ρL/A) / L = Iρ/A.Given: ρ = 10⁻⁷ Ωm, A = 10⁻⁶ m², I = 0.1 A.K = (0.1 A * 10⁻⁷ Ωm) / (10⁻⁶ m²) = (10⁻¹ * 10⁻⁷) / 10⁻⁶ V/m = 10⁻⁸ / 10⁻⁶ V/m = 10⁻² V/m.

Answer

10-1 V/m

Answer

10-2 V/m

Answer

10-4 V/m

Answer

10 V/m

Related Questionsin Physics

More from CUET UG

Browse CUET Questions by Subject

Practice More CUET UG Questions